Sean Kane is forced to resign from the San Francisco Police Department's Narcotics Division when he goes berserk after his partner is murdered. He decides to fight alone and follows a trail of drug traffickers into unexpected high places.

A mentally ill man in a small Texas town goes on a killing rampage and is fatally wounded by police. When doctors use an experimental serum to bring him back to life, the killer develops superhuman strength and the town sheriff must pursue him.

A Chinese-American cop, skilled in martial arts, battles the most powerful criminal gang in San Francisco that is responsible for the death of his partner.

A Chicago cop is caught in the middle of a gang war while his own comrades shun him because he wants to take an irresponsible cop down.

Scott James, a veteran martial arts expert, is recruited as the protector of the wealthy and beautiful Justine after she becomes the target of a ninja clan. When Scott finds out that his ruthless arch-nemesis, McCarn , is involved with the stealthy and dangerous criminals, he is eager to settle old scores. Soon Scott is facing off against McCarn and the entire ninja horde in an effort to take them all down.

A pair of adventurers try to track down an ancient Aztec/Mayan/Egyptian/Apache horde of gold.

Karate champion Matt Logan is enlisted by the police to train officers in self-defense after narcotics agents are killed by an assailant using the martial arts.