Hope joins forces with an unlikely ally to take down a Christmas monster, who's using holiday cheer to infiltrate the Salvatore School. Elsewhere, Landon surprises Rafael with news about his family lineage, and Sebastian accompanies Lizzie on her latest mission.

Back and ready to wreak havoc, The Necromancer's plan for revenge on Malivore takes a turn when he realizes he is now a human and powerless. To mend fences with Josie, Hope offers to help her learn more about the mora miserium. Elsewhere, Alaric enlists Landon's help to find out if Sebastian is a threat to the school.

As the witches of the Salvatore School come together to celebrate Coven Day, the latest monster to infiltrate the school targets Alyssa Chang and the other students by spreading discord and creating chaos among the covens. Elsewhere, Alaric, Lizzie and Josie search for a solution that keeps Josie protected from the dark magic brewing inside the mora miserium. Fed up with feeling powerless alongside Hope, Landon asks her to give him self-defense training. Finally, Alaric's past comes back to haunt him.