After the breach, Chloie and Harlie have to make their way back to HQ to survive. On the way back Chloie discovers more about the nightmares on the preserve and how little she really understands.

At midnight, Commander Cushing leads a military convoy into the Nightmare Preserve — a vast wilderness where nightmares are contained. When their systems fail and an ancient creature appears, a new terror awakens. Deep in the mist, Chloie and her sister Harlie fight to survive as the line between humanity and nightmare begins to blur.