In a city engulfed in chaos and indifference, Arthur Fleck is a man trapped in his own mind. Working part-time as a clown and aspiring comedian, his life is a reflection of the anguish and isolation he feels in a world that seems to turn its back on him. Suffering from mental health issues that complicate his existence even further, Arthur struggles to connect with the people around him, but he always ends up being the victim of mockery and violence, both from his peers and from the institutions that should be providing him with support.
As his life unravels, Arthur is pushed to his limits. Constant failures, societal disdain, and contempt from his loved ones lead him to adopt an alternative identity that embodies everything he hates and fears. When a series of tragic and violent events trigger his transformation, a charismatic and dark figure begins to emerge, whose desire for revenge sets the tone for a new chapter in his life.
As Gotham City descends into disorder, Arthur becomes the symbol of a chaotic revolution, challenging the elites who have kept the people mired in suffering. It is a story of struggle and resurgence, where laughter and pain intertwine, and chaos reigns in a world that rarely shows compassion. Everything culminates in a series of decisions that will alter not only his life but also that of the entire city.