Struggling with his dual identity, failed comedian Arthur Fleck meets the love of his life, Harley Quinn, while incarcerated at Arkham State Hospital.

In a sleepy town, one man, a wannabe horror film director is about to have his life and the world he knows change forever. Finally, he gets the big break he has been waiting a lifetime for, but its not Hollywood knocking on his door.

A harmless game of "Truth or Dare" among friends turns deadly when someone—or something—begins to punish those who tell a lie—or refuse the dare.