A secluded warehouse is raided by ATF agent Nick Adams in order to crush the gunsmuggling ring of his arch enemy Jimmy Wong. Nick then learns that his best friend has been killed while undercover in a prison. He is really upset by this and is determined to find the killers. So he poses as an inmate of the prison, where he is soon to find himself in a world of corruption and violence with murder on almost every corner. Only his martial art skills can help him survive.