The stakes were clear after the Change- survive together, or die.

Calay and Tess's love has kept them alive four years after the aliens decimated Earth. But when Calay finds herself fighting for her life and Tess missing, she hears death knocking. Banging, really. She has nothing. Scraps for food, the clothes on her back, no safe place for respite. And yet, she is determined to risk it all to reunite with the one woman she has ever loved. She only has one choice: she must find Tess.

Reluctantly, Calay braves the new nightmares of a ravaged Pacific Northwest, alone. Thrust into the darkness, she is haunted by horrors beyond her imagination-alien executioners, a mysterious man, the rise of a sinister cult, and a shocking family secret that challenges everything she thinks she knows.

As the lines between good and evil blur, Calay's desperation threatens to destroy what's left of her humanity. Her heart smeared across her tattered sleeve, she is pulled deeper into the madness of a world that has become kill or be killed.

Calay must deny her feral instincts and resist becoming a monster herself. While confronting her demons, she stares down the barrel of a terrifying truth: she may be forever alone. Time is running out and she knows it. Her only hope is to become who she is truly meant to be and unify with the love of her life once and for all. But, at what cost?

To survive, Calay must choose between the unthinkable: give up, or give 'em hell.