A man wakes up in a dark, muddy cave with no memory of who he is or how he got there. Confused and disoriented, he discovers that an underground industrial complex surrounds him, filled with hostile plant-like creatures and remnants of a civilization that has experienced environmental collapse. As he navigates the dilapidated and labyrinthine structure, he slowly uncovers visual clues and fragmented memories suggesting a link to a massive botanical project aimed at salvaging the world's ecosystem.

Driven by a need to understand his past and the purpose of the complex, he evades threats and encounters various strange and eerie figures, each providing cryptic hints about the facility's true function. His journey through the decaying environment becomes a race against time as he battles not only the physical dangers but also his own deteriorating condition. Along the way, he unravels the mysteries of his identity and the nature of the project, exposing secrets that could have significant implications for his future and humanity's survival.