A socially inept clown for hire, Arthur Fleck aspires to be a stand up comedian among his small job working dressed as a clown holding a sign for advertising. He takes care of his mother, Penny Fleck, and as he learns more about his mental illness, he learns more about his past. Dealing with all the negativity and bullying from society he heads downwards on a spiral, in turn showing how his alter ego "Joker", came to be.
