Wynonna Earp is coming home to battle her greatest foe yet: a psychotic seductress hellbent on revenge against her...and everyone she loves.

Wynonna and Doc are on the road but return to Purgatory when an old and previously unknown demonic enemy from Wynonna's past on a mission of vengeance sends a grisly invitation, which Waverly and Nicole get word of and relay to the out-of-town Earp heir.—GislefW