A terrifying being is summoned - one that even the possessed Sister Mary Eunice is scared of. As Kit and Lana resort to desperate measures, a despairing Sister Jude finds she can no longer run from her past.
Duke is forced to steal crucial evidence from the police locker in exchange for his kidnapped granddaughter but Five-0 help him. Jerry goes undercover at a mental health facility to solve a murder.
When Ichabod goes missing, Abbie has a vision that the headless horseman will return to Sleepy Hollow; Abbie turns to Henry Parrish for help.