Ranger BRODY, with the help of his nephew and niece DYLAN and NAOMI, is preparing to open the brand-new campground for the season. Everything is in order and the camp seems peaceful until GIANT RANT, mutated from multiple dumping of toxic wastes, begins killing the campers and rangers.

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?