Delta-Six is first seen strapped to a surgical chair, as 3 people get ready to wipe his memory from his preceding escape attempt. Completely powerless, he must consciously undergo the procedure and is later found confused in a cell. A man, known only as The Director, speaks to him about his memory wipe and his upcoming training procedure. It is here he will learn to wield weapons, as he is prepared for rehabilitation into a decent citizen, according to the prison's plan.
During his incarceration, he will meet fellow inmates that remind him of his escape attempt; being Balder, Giselle and an unnamed girl called Epsilon-Five. With these people, Delta-Six will try to get a bearing of the things that go on in the centre and see where to go to from there.