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.

Lady Luck seems to have abandoned Wynonna and Nicole when an errand for Nedley goes terribly wrong. Mama discovers Doc's secret.

It's date night in Purgatory, which means dressing up, drinking, and fighting demons as a formidable, former foe stalks the gang.

A mysterious woman who knows a little too much about the Earps arrives on the Homestead with a special mission for Wynonna and Waverly. The rest of the team must wrangle a deadly fire witch.

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.

The Pledge Moon looms over Purgatory as Wynonna and Waverly must find a way to end the family curse before their demonic foe puts an end to the Earp line - and humanity - once and for all.