Lilly reopens a 1978 case in which a young man was stabbed to death outside a theater where the slasher flick "Halloween" was playing. At the time, the unsolved murder was thought to have been committed by a copycat killer influenced by the film. But when the victim's mother comes forth with new evidence, Lilly doesn't buy the copycat angle. Shortly before the man died, he proposed to a friend who was paralyzed. His mother believes that proposal led to his death.

Lilly investigates the 1954 murder of a woman who was allegedly bludgeoned to death shortly after being released from an asylum. The case is reopened after an elderly woman dies and her estranged son claims the deceased is not his mother. The probe reveals that his mom was the 1954 victim. She was committed to the asylum after nearly killing herself and her son in a house fire that she set. Also, Valens learns the truth about Josie's past.