Refusing to believe Autumn Donnelly is truly gone, Constable Quinn Sullivan has been searching for a way to bring her back through the Black Door, but to no avail.

Despite his efforts, he is forced to abandon Autumn to her dark fate, as the force behind her disappearance seeks to gain its true power after decades of waiting-to bring its unborn child into this world and create Hell on earth.

Quinn's friends and co-workers at the detachment rally to his call, for their watch has not ended. What they have experienced before has not prepared them, or Quinn, for what truly awaits.

With the help of Gemma, Autumn's mother, and her Man In Black, Bobby, Quinn must try to save Resolution Cove and his dear friend. To do so, he must make a choice: to sacrifice the woman he loves and her child or save Resolution Cove from annihilation.