Nightmare Nightmore Draculaura plans to celebrate "Nightmore", a Holiday for monsters to have fun, but her witchcraft is disabled. She invites Clawdeen, Clawd, Frankie, Lagoona, and Heath to celebrate at an abandoned mansion where there is snow. When Clawdeen steps outside, she is buried in the snow and they all encounter a Yeti girl named Abbey Bominable. Abbey explains her story and the monsters decide that she should celebrate Nightmore with them, which Draculaura accepts...