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.
A group of hobos begin melting into multicolored piles of goo after drinking sixty-year-old liquor. At the same time, the psychotic Vietnam War vet who rules the hobo camp snaps and begins killing at random. Two brothers set out to stop the liquor and the killer.
When teacher Randall Thomasson is killed during a carjacking, an unexpected visitor shows up at his funeral - his estranged brother, Karl Thomasson. An ex-Green Beret turned mercenary, Karl signs on as a new substitute teacher in order to investigate Randall's murder.
