A Marine patrol stops at Firebase Gloria at the start of the Tet Offensive during the Vietnam war. With the firebase attacked, the patrol remains to help defend it.

Captain Baronski, assigned a squad of misfit soldiers, trains them into a fighting powerhouse "The Expendables." Breaking every rule, they must risk their lives crossing into Cambodia to save the American hostages.

Miami 1980, a doctor transplants a metal object into a patients arm. He tells him to go home and relax, but soon the patient kills the doctor. One year later, Prof. Arlington is kidnapped by thugs and taken to a secret location. Awesome action ensues.