Prince Tim of the undersea kingdom of Gotham is secretly fed up with his forced role as next king. Constant pressure to live up to the expectations of his adoptive father King Bruce, siblings who seemingly despise him for his privilege, and his only ally being Damian who secretly shares his forbidden love of humans and the world above. After he saves human Stephanie Brown and falls for her, Tim makes the choice to consult the wicked sea witch the Joker who offers him the chance to become human with a catch: he must sacrifice his voice; this outrages his siblings and their friends who must come to terms with their own self-worth issues and help Tim while also accepting who he is..