Pete and Myka go to Las Vegas to fetch an artifact that is helping a couple of gamblers, but the mission goes awry when Myka becomes trapped in a famous author's mirror.

A super-powered vigilante is at large in Detroit, and the agents try to track down the person responsible. Meanwhile, things between Leena and Claudia are still tense, and Artie is haunted by the spirit of his dead friend.

Sally Stukowski and her partner make their move, attacking the Regents and using an artifact to trap them in a building and bring it down around them.

Myka and Pete deal with a plague of zombies in Ithaca, while Claudia deals with a new romance, a prophecy of death, and a rejection from a friend.

The Brotherhood continues its assault on Artie's life, targeting someone close to him with Alice Liddell, the imprisoned spirit within the Dodgson Mirror. Meanwhile, Claudia learns of the connection between her and Steven.

The agents track down a cache of artifacts stolen from Warehouse 12 by the infamous Roaring Dan Seavey... and guarded by his ghost. Meanwhile, Charlotte Dupres makes her move with the help of her inside person.

The alternate-timeline Valda makes his move, using Claire as his mindless slave. As Valda sets out to move Warehouse 13 to a new location that he can control, the team races desperately to stop him before it's too late.