At a college visit to a war buddy's professor daughter, mercenary Treat Williams finds her brutally beaten. He then poses as a teacher to teach a lesson to the football jocks responsible.

When an inner-city Miami schoolteacher gets her knee broken after standing up to the school's gang leader, her mercenary combat specialist boyfriend goes undercover as a substitute teacher to take down the punk. Soon he discovers a conspiracy of criminals at work, and must reassemble his team from his last jungle raid to stop them.