When a group of troubled teenagers get a week's community service in a remote California forest called Grizzly Park, they get more than they bargained for. Under the supervision of the stalwart Ranger Bob, their punishment is to clean up the park before it closes for the winter. However, they're also being stalked by an escaped serial killer with an insatiable bloodlust and a nine foot tall, thousand-pound and ravenous Grizzly Bear. Little do the group realise that as they confess their past, their future looks doomed! As the group are stalked and attacked, one-by-one, the teens have to face the ultimate challenge.... survival!