Killjoy, the demon of vengeance, trickster god and killer clown has finally made it to Earth! Along with his gruesome crew Freakshow, Punchy and the sexy/psychotic Batty Boop, Killjoy is free to terrorize mortals in new and excruciating ways.

As a last wish, a recently hospitalized grandmother, Evie, tasks her daughter and granddaughter, Sara, with a list of festive accomplishments to do together before Christmas, hoping that the adventure of the experience will repair their relationship. Along the way, Sara discovers an unlisted Christmas adventure of her own.