Chrysalis

"He did not know how long he had been prisoner in the place. Maybe for months or years, perhaps longer or less. The darkness around him was thick and impenetrable. He knew to be in a very small room, which allowed him to walk only three or four steps from wall to wall."
A mysterious prisoner, locked up for years in the same small underground room, without light, with very little food other than mice and insects, sees materializing a glimmer of freedom. Who has locked him up? Why was he imprisoned? But the bigger mystery for the prisoner is his own identity: who am I? The mystery unfolds in a succession of horrors until the impossible truth.