A demon causes havoc in town as Wynonna, Waverly and Jolene must decide who they can trust.

Eggnog for everyone! It's holiday season in Purgatory! Wynonna teams up with a new ally to search for a missing kid on Christmas Day. Meanwhile, Waverly learns more about her father.

Wynonna has a run in with Revenants that leads her to an unexpected revelation about the curse. Waverly meets an important figure from her past, and Nicole tries to evacuate Purgatory - before it's too late.