A chemical blast at a military base sets off a supernatural disaster. As Sgt. Dash tries to keep the peace at the local police station, the explosion unleashes a toxic acid rain that dissolves the flesh of anyone trapped in it. Even worse, it causes the dead to rise again and attack the living. Can Dash and fellow officer Nina Rossi figure out who is friend and foe, fend off the attacks, and defend their colleagues until the savage cataclysm subsides?