Incarceron is a fictional prison created by author Catherine Fisher in her novel of the same name. It is a vast, self-contained facility designed to hold the most dangerous criminals. The prison is alive, with its own ecosystem and rules, making escape nearly impossible. Inside, inmates face harsh conditions and must navigate a complex social hierarchy. The story follows two main characters: Finn, a young man who believes he is from the outside world, and Claudia, a girl living in a technologically advanced society outside Incarceron. Their paths intertwine as they seek freedom and uncover the mysteries of their worlds.