You’re just a kid with your whole life ahead of you, who loves the planet and wants to take care of it ? What if adopting an organic and vegetal being of monstrous size was the key to success? That's what Charlie, 6 years old, and her brother Zach, 11 years old, realize when Harrison, a huge, lively and kind plant being, joins their family-life. By taking in and caring of Harrison, Charlie, Zach and their friends Bintou and Leon, take initiative, DISCOVER how to RECONNECT WITH NATURE. Harrison and the kids act together and learn with humor to always consider nature. Each episode is related to NATURE in its own way, and stages an EMOTIONAL ISSUE through which our heroes will evolve !