Fighting Spirit (1992)

Billy is a young fighter whose sister Judith was hurt after a near gang rape When he learns she must have surgery crime boss Russell has Billy compete in illegal street fights When Billy learns he may get killed he quits but is later killed by Russell and his men who were the ones responsible for Judiths accident After his death Billy must rely on one man to seek revenge for him his best friend David However David must train in the martial arts before he can seek revenge Davidy seeks guidance from the ghost of Billy as well as Billys trainer and ally Murphy