Traveling through rural Mexico on their way to a job in Central America, a small band of American mercenaries halts their journey to bivouac in the countryside for a few days. Their leader, Colonel Burckhardt (Blacula's Charles Macaulay), plans for the men to mix a bit of training with R&R as they wait to rendezvous with additional personnel. The six mercs under Burckhardt's command are a motley crew of combat vets, and they're either completely amoral or murderously psychotic. Unfortunately for two hitchhikers - a young pacifist and his beautiful girlfriend - that "down time" comes to involve the soldiers beating the tar out of him, raping her, and setting up a vicious contest in which she becomes the prize...