Committed to Arkham State Hospital for his violent obsession with rats, Willard Stiles is placed in a room next to the infamous Arthur Fleck.

It’s been several months since Arthur was arrested for multiple murders. There’s little left of the passive victim he had once been. Something about Willard nabs his interest, and he’s determined to goad the introverted Stiles into reveling in his true nature, rats and all.

Hunter’s murky past has brought her to Gotham where she takes a job in housekeeping at Arkham. She forms a potentially dangerous bond with Stiles and Fleck and is swept into their escape plan.

Things are almost too easy for the threesome, since those in charge seem oblivious to their growing relationship. Someone is watching them carefully, though--someone with designs on Joker and an offer that means either freedom or death for the trio.