On Christmas Eve, a young Batman faces the biggest challenge of his early career when crime boss Black Mask places a bounty on his head, attracting eight deadly assassins to Gotham. As Batman investigates, he uncovers a deeper plot — the true mastermind is The Joker, a dangerous new villain who wants to push Batman to his limits. Battling both assassins and corrupt cops, Batman begins to shape his moral code and forms an uneasy alliance with Captain Gordon, setting the foundation for his future as Gotham’s protector.