On the night that 17-year-old Dong-jun's only friend, Kang-hyeon, fell from a high place, Dong-jun made a choice that determined the direction of his entire life. Dong-jun's regrets and remorse following that choice made him experience life in three different universes. These are the various lives of the 42-year-old Dong-juns who live different lives in Seoul, Daegu and Busan 20 tears later.
Sim Hee-seop , Hong Xa-bin , Shin Joo-hyup , Kim So-hee , Kim Joo-ryoung , Kim Hak-seon , Kwon Ji-woo , Ok Ji-young , Kwon Dong-ho , Song Chang-eui
