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.
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.