Having lost Malcolm, the Pack is forced into an uneasy alliance with a Coven of witches against a common enemy. But, when this new threat proves to be more powerful than they anticipated, and both the Pack and Coven suffer heavy losses in the confrontation.
Elena awakens to find herself the subject of painful tests in a hidden compound run by a maniacal and powerful cult leader. Meanwhile, The Pack and witches must resort to dark magic in an effort to track down their missing members.
Aleister casts a spell on Elena, forcing her into a battle against her own dark fears and demons. Meanwhile, Rachel is locked in a cage with Logan, struggling to come to terms with what he is. Clay and Paige must overcome their personal differences in order to find Aleister's compound.
When the new Spanish Alpha tries to blackmail Jeremy into murdering the Russian Alpha, the Pack has things under control until a surprise visit from Savannah upends their plans. Nick and Paige try to secretly meet Nick's mother.
Aleister returns to Stonehaven as Clay where he convinces Jeremy to let the Coven complete her initiation ritual on the property. Meanwhile, Clay finds himself trapped in his unconscious, wrestling with Aleister and his own mind.
With Aleister's Undoing spell activated, Elena, Clay, Paige and Nick try to find him at Clara's house, only to discover Aleister's sinister endgame for Savannah once the Undoing is complete. Jeremy helps Ruth delve into Left Hand magic in order to take down Aleister from afar, and Logan spirals into his own dark corner.