Botanist Lu Zhao struggles to survive in an apocalypse consumed by devouring vines, desperately searching for his missing wife and daughter. In the ruins of a pharmaceutical factory, a mysterious girl named Xiaoman saves him. She can control the deadly vines and has an exceptionally high IQ, yet trauma has left her trapped in fear and cowardice. She also wears a keepsake belonging to Lu Zhao's wife. Forced to protect this "key," Lu Zhao takes her on a desperate journey to find the "Ark," the origin of the vines, as factions hunt them down...
