A troubled young man battling mental illness wonders if the visions he experiences are real following a strange encounter with a fellow patient.

With Ptonomy's help, David goes back in time to find a meaning in his memories. As he remembers his sister needs him, he tries to leave but Syd convinces him he's the key to everything.

David searches for answers, while a threat looms.

David's in trouble, while his friends search for answers.

David faces a new threat.

David goes back to where it all started.

The Interrogator goes after David for revenge but has a surprise waiting. Division 3 is observing the turn of events. Cary devises a new experiment to separate the monster from David, but things do not go as planned.