Mehmed, having overcome many obstacles, prepares for the siege of Constantinople, uniting his viziers and subjects. He strengthens the navy, led by Baltaoğlu, who aims to reunite with his brother, Rizzo. Çandarlı makes Rizzo grateful to the Ottomans, and Mehmed sets his plan on Rizzo, whose help is crucial. In the Harem, preparations for the siege continue, with Mara, Bahar, and Gülşah actively involved. Gülşah's pregnancy adds excitement, with the upcoming birth expected to change the harem's dynamics. In Byzantium, the fear of the Ottomans grows, and Constantine, struggling to make decisions, is advised by Plethon to call Notaras back. This decision's impact on the Byzantines remains to be seen.

After Admiral Rizzo's betrayal and Hayrettin's death, Mehmed plans revenge, forcing Rizzo to seek refuge in the Pontus Greek Empire, which must choose between surrendering Rizzo or facing Ottoman wrath. Rizzo is also targeted by Çandarlı for causing his nephew's death. In Byzantium, Emperor Constantine invites Notaras, who begins forming alliances with the Kingdom of Serbia and Karaman Principality, aiming to corner the Ottomans. The success of these alliances and their impact on the Ottoman siege plans remain uncertain. In the Harem, the alliance attempts affect Mara Hatun and Gülşah Hatun, creating tension and a test of loyalty towards Mehmed, possibly leading to a rift.

After thwarting Byzantium's plans and responding to Notaras, Mehmed continued his conquest preparations, warning his pashas to stay vigilant, especially Baltaoğlu. However, Baltaoğlu fell victim to Konstantinos' plot. Çandarlı, seeking revenge for his nephew Hayreddin, focused on finding Rizzo. Konstantinos, seeing the failure of alliances with the Serbs and Karamanoğlu, sought the Pope's support but was rejected, except by Giovanni Giustianni, who nonetheless set off for Constantinople.

Mehmed holds Baltaoğlu Süleyman Pasha accountable for Guistinianni's entry into the city, facing a potential execution. Çandarlı may try to persuade Mehmed to change his mind. In the harem, Prince Beyazıd's discomfort might continue due to the attention given to Mustafa. Meanwhile, the Balinese pursuing Demetrios in Mora face various challenges and obstacles, with Demetrios and his wife Theodore plotting their own strategies. In Constantinople, the arrival of Guistinianni's soldiers will impact the city's atmosphere. Both Ottoman and Byzantine sides prepare for tactical battles before the siege, with Mehmed planning his moves towards the city's walls and gates. The responses of Zağanos, İshak Pasha, and other Kubbealtı ministers to Mehmed's strategies, as well as the defensive plans of Konstantinos, Notaras, and Giustinianni, will shape the upcoming conflict.

Mehmed questions Gülşah and Bahar, blamed for Prince Beyazıd's condition, about their responsibilities. The harem's roles might change, with Mara Hatun managing potential conflicts. Demetrios, grieving his child's loss, considers avoiding the Byzantine-Ottoman conflict, while Theodore, devastated, urges him to leave for Morea. In the Ottoman court, Zağanos Pasha, who acted without Mehmed's approval, faces potential consequences once Mehmed learns the truth. Guistiniani, arriving in Constantinople, aims to defend the Golden Horn against the Turks, while the Emperor strategizes amidst internal disagreements. Guistiniani also targets Turkish spies in the city. In Galata, tensions rise as Notaras deals with Lomellino, who sides with the Turks, and Janissaries are sent to protect the Golden Horn chain. Sultan Mehmed calls for an unprecedented consultation with the sanjak beys, including Teke Sanjak Beyi Ismail, whose political stance before the siege remains crucial.

Teke Sanjak Bey Ismail and those responsible for the assassination attempt on Sultan Mehmed with the poisoned robe await the Sultan's verdict. Zağanos, who revealed the plot, might influence Mehmed's judgment. Zağanos Pasha, who acted without the Sultan's approval and caused Demetrios' child's death, faces a potential showdown with Çandarlı Pasha. Meanwhile, Sultan Mehmed must respond to the massacre of Ottoman Janissaries in the Golden Horn, which could significantly motivate the council and army and impact the siege. Guistiniani, planning through Lorenzo, aims to counter the Ottomans, possibly informing Constantine. He seeks to expose spies within Byzantium. Key players like Lomellino, Minotto, and Lorenzo face significant developments amid these showdowns.

As Sultan Mehmed prepares for the great siege, he aims to breach the walls and enter the Golden Horn. He assigns critical responsibilities to his trusted men and plans who will sit on the throne during his absence. He must appoint someone to the Rumelia Beylerbeyship after Hamza is wounded, with Çandarlı Halil Pasha and Zağanos Pasha's input. Saltuk and Bali have important tasks until Hamza returns. In the harem, a surprise occurs during Beyazıd's journey to Manisa. Meanwhile, Constantine works on creating grejuva fire against the Turks, and Giustiniani seeks to expose Turkish spies in Constantinople, including suspicions about Mustafa. Giustiniani holds Notaras responsible for Cardinal Isodor's death, and the Emperor must respond. Demetrios plans against Hamza, and there are surprises in the mission to bring Giustiniani and those with the grejuva secret to the city.

Mehmed embarks on his conquest with a desire for martyrdom. His success depends on his staff agreeing on the strategy and shaping his policies towards his vizier and the Janissaries. Hamza's wounding affects the Malkoçoğlu tribe and the Rumelia Beylerbeylik, with moves expected from Çandarlı and Zağanos Pasha. Guistiniani suspects Mehmed's spy Mustafa and needs to present proof to Emperor Constantine. Nadia seeks validation from Guistiniani despite her romantic entanglement with Anna. Notaras, implicated in Cardinal Isodor's murder, seeks assistance. Demetrios, grieving his child's death, must decide on his political allegiance. The safe arrival of Mehmed's Şahi cannon is crucial, while the Grejuva master must meet Konstantinos' expectations. Internal conflicts among the Janissaries add tension. These events will determine the outcome of Mehmed's conquest.

Urban and Mehmed insist the damaged Şahi cannon be detonated, tasking Saruca with this risky mission. The explosion's aftermath for Mehmed is uncertain. Çandarlı aims to win Mehmed's favor for Kalender and isolate Kurtçu politically. Çandarlı, Zağanos, and İshak Pasha hope to use Plethon's peace call to their advantage, questioning if they realize it's a ploy. Demetrios, grieving his child, seeks Hamza. Alperen, having volunteered without consulting his father, contemplates his actions post-discussion. Konstantinos searches for Cardinal İzodore's killer, awaiting crucial news. With the Turks nearing, Konstantinos plots his next move. Orhan and Mustafa face potential danger. Emotional ties between Guistiniani and Anna develop, while Guistiniani's suspicion of Notaras in Isodore's death is under scrutiny.

Mehmed's response to Plethon's peace offer and his complacent minister will impact the conquest. Zağanos brings news involving Evrenosoğlu, influencing Mehmed's stance. Mehmed's reaction to Grejuva's attack on the Janissaries will shape the general assault and its outcomes for Kurtçu. Çandarlı Pasha delivers crucial news from Constantinople, potentially altering decisions. Alperen, who joined the siege without consulting Evrenosoğlu, faces significant actions. Ferhat, backed by Çandarlı, aims to secure the Rumelia Beylerbeylik seal and win the Sultan's favor. Demetrios' motivation against Mehmed is in question upon his return. Nadia, jealous of Anna and Guistiniani's relationship, plans an attack, potentially impacting Guistiniani's motivation.

After the assault on the Walls, Mehmed's decision will impact the course of the conquest. Kalender's mention of a brave raider to Mehmed hints at a potential game-changer for the conquest. Orhan's aide in Constantinople and Mustafa are revealed as spies, affecting Mehmed's side and prompting Ferhat to take action. Meanwhile, Janosh, motivated by revenge from the Kosovo War, may disrupt Mehmed's plans. Çandarlı Pasha's schemes for Kalender Ağa and Ferhat Pasha aim to strengthen his influence over the Sultan. The new danger awaiting Bali and Hamza tests their resolve. Constantine, under siege and pressure, makes moves to defend his city. Giustiniani's emotional connection with Anna could impact his motivation and effectiveness in defending Constantinople against the Turks.

Mehmed, determined to take Constantinople, casts a new hawk cannon and digs a tunnel for underground advance. Satılmış Ağa helps overcome obstacles in the tunnel. After the martyrdom of his spy Mustafa, only Fatima remains to provide crucial war-changing news to Mehmed. Guistiniani, after securing help from the Pope, brings aid to Constantinople with John Grant. Mehmed must decide how to stop these aid ships. Battal, seeking revenge for his murdered family, targets Janosh. Whether Battal will succeed in killing Janosh is uncertain. Notaras disapproves of his daughter Anna's relationship with Guistiniani, preferring her to marry Konstantinos. Anna's suicide disrupts Notaras' plans, creating uncertainty about her survival and Notaras' next move. Kalender, consolidating power, faces opposition from Kurtçu, leading to a conflict that will influence upcoming events.

Sultan Mehmed assigns Admiral Suleyman Pasha to stop the Pope's aid to Constantinople. Mehmed watches the naval battle from the shore. Satılmış Ağa helps overcome a large rock, allowing Mehmed's attack plan to proceed. Mehmed orders his staff into action, with Battal Bey, Saltuk, and Satılmış Ağa taking on a dangerous mission. In Byzantium, Constantine is betrayed and wounded by Anna, who is imprisoned. Nadia plans revenge against Byzantium and Guistiniani. The tension between Kurtçu Doğan and Kalender rises, with Kalender seeking the position of Janissary Agha and Kurtçu angering Mehmed. The outcomes of Suleyman Pasha's mission, Mehmed's attack, and the internal conflicts in Byzantium will shape the fate of Constantinople.

Mehmed, recovering from a defeat, prevents an epidemic in Rumeli Hisarı with Kurtçu's help, earning Kurtçu the Sultan's pardon and foiling Kalender and Ali Haydar's plans. Kalender seeks Çandarlı's support to replace Kurtçu, leading to a radical new plan. Ferhat Pasha orders a raid on the Sultan's caravan carrying a cure for the epidemic. Battal and Bali Bey are dispatched to stop Dugin and his men. Ishak Pasha grows suspicious of Ferhat Pasha, who tries to deflect suspicion by claiming to save Mustafa. On the Byzantine front, Guistiniani's soldiers join Salvador's troops. Demetrios announces his intent to marry Anna to the senate, potentially altering the balance in Byzantium, and awaiting Konstaninos' reaction.

Sultan Mehmed crushed a Janissary rebellion, executing Ali Haydar and his followers. He then sent Battal and Bali Bey to eliminate bandits, capturing Ferhat’s chamberlain, Beşir, and questioning Ferhat Pasha's loyalty. The Ottoman army attacked Constantinople with the Şahi cannon, creating a breach at the St. Romanos Gate. Despite heavy resistance and losses from Byzantine defenders, the Ottomans continued their advance. The battle's outcome would decide if Constantinople would become Istanbul.

During the Ottoman attack on Constantinople, Sultan Mehmed is wounded by a Byzantine soldier, leading to a temporary retreat. Sultan Mehmed, initially despondent, is inspired by Akşemseddin to renew his belief in conquest. He sends Ferhat Pasha as an ambassador for a prisoner exchange, but Ferhat is suspected of being a spy. Ferhat is captured and brought before the Sultan. The unfolding events will determine the fate of the Ottoman army, the revelation of traitors, and the ultimate success of the conquest.

Mehmed uncovers Ferhat as a spy for Byzantium and executes him. This revelation prompts Mehmed to question how such a spy operated undetected and who might be accountable. The Pope's favorite, Salvador, is murdered, creating a crisis in Byzantium. Meanwhile, Baltaoğlu seeks to regain his position after taking refuge with Kurtçu. His desires could have significant political implications. Maria tries to clear suspicions surrounding her, while Notaras and Gennadius play crucial roles. Baltaoğlu's encounter with Harry, who caused his disgrace, could lead to revenge or a different path. These events significantly impact Mehmed's plans and Byzantium's defense.

Baltaoğlu Süleyman is found covered in blood in his tent, prompting Sultan Mehmed to order an immediate investigation. Hızır Çelebi leaves the suspects to their consciences, while Mehmed is eager for swift justice to avoid any delays in the conquest. Çandarlı dismisses the investigation as a waste of time. Amidst accusations against Bali Bey, an ambush further stirs tensions between raiders and janissaries. Zağanos and Bali Bey are held accountable, and Hamza from Köstenceli makes a decisive move, altering the balance. Saltuk announces Battal's martyrdom, and Don Francesco Constantine is troubled by the raiders near the city. Meanwhile, news of Don Francesco's arrival in Constantinople causes a stir, and Constantine considers seeking help from a warrior named Francisco. Tensions in the palace and on the front continue to rise, awaiting Mehmed's verdict.

Murtaza and the rebels receive punishment, causing unrest in the headquarters. Mehmed's harsh justice affects the army and Kurtçu's stance is crucial. Akşemseddin meets Harry in the prison camp to maintain balance between the çeris, raiders, and volunteers, impacting his relationship with Mehmed. Hızır Çelebi investigates Baltaoğlu's murder amidst rising tensions, while Francesco's decision in the Byzantine world influences the conquest. Harry, suspected of murder, faces divided suspicions, with Çandarlı trying to clear his name and his journey with Zağanos Pasha potentially altering his standing.

Harry's death causes significant turmoil at the headquarters. Mehmed must navigate the chaos and maintain the delicate balance among Çandarlı, Zağanos, Akşemseddin, and the Janissaries. His decisions in the council before the conquest will resonate within the army and the spiritual leaders at the headquarters will impact the soldiers' morale and enthusiasm. Mehmed's consultations are crucial for strengthening his dominance over the army. Meanwhile, Francesco faces a difficult crossroads following his brother's death, and must decide whether to accept an offer that brings him closer to Byzantium or take on the Turks, potentially ignoring his old friendship with Mehmed. Constantine will make new moves to protect his city, to which Mehmed must respond. In the palace, Bahar and Beyazıd will encounter significant surprises, while Evrenosoğlu and the Akıncı will face a development that changes their fate.

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