When a teacher is assassinated by a hitman, a karate instructor steps in to protect the students and uncover the truth behind the murder. He must navigate through dangerous fights, deceit, and a web of lies to keep the school safe.

After a mercenary kills his girlfriend, a former commando goes undercover as a substitute teacher at a military academy to take down a dangerous criminal network involved in white supremacy.

An ex-special forces soldier is hired as a teacher at a crime-infested school and must use his combat skills to take down an organized crime syndicate. Along the way, he encounters drug addiction, murder, and attempts on his life.

A mercenary on a secret mission enrolls as a substitute teacher in a high school. He must protect his students and take down a dangerous gang.