A poor family, the Kims, con their way into becoming the servants of a rich family, the Parks. But their easy life gets complicated when their deception is threatened with exposure.
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.
A cop from the provinces moves to Paris to join the Anti-Crime Brigade of Montfermeil, discovering an underworld where the tensions between the different groups mark the rhythm.