Left to rot in Arkham State Hospital after the televised murder in Joker (2019), an emaciated Arthur Fleck now awaits trial for his crimes. Trapped in a cage and seething inside, Arthur grapples with his alter ego, seeking ways to vent his frustration and rage. And then, he sees her; Lee is not only a fellow inmate but also Arthur's true psychopathic soulmate. With music setting them free, sparks fly, and tomorrow doesn't look that bad. Who cares what people think? Does the world know what it means to be crazy in love with somebody?