An aging Chinese immigrant is swept up in an insane adventure, in which she alone can save the world by exploring other universes connecting with the lives she could have led.

In Gotham City, mentally troubled comedian Arthur Fleck is disregarded and mistreated by society. He then embarks on a downward spiral of revolution and bloody crime. This path brings him face-to-face with his alter-ego: the Joker.

Jackie Cogan is an enforcer hired to restore order after three dumb guys rob a Mob protected card game, causing the local criminal economy to collapse.