Welcome to a grim and gloomy 1980s Gotham City where Arthur Fleck struggles with deteriorating mental health while eking out an existence as a street clown. At home he takes care of his ailing mother Penny Fleck, while being bullied and mocked by society. It’s a potent cocktail that leads him down a dark path where hatred and violence seem like the only release. This is the birth of a new breed of super-villain.