An impoverished stand-up comedian is driven insane by a streak of failures and contempt by his society in Gotham City. His life is eventually ruined and he turns into a notorious psychopathic murderer.
The work picks off where the movie Joker left off, with Arthur Fleck continuing his corrupt tour around Gotham City following his escape from the Arkham mental facility. He meets Harley Quinn, and many problems arise.