The best Michael Tong Chun-Chung’s thriller movies

This is one of those -"who did it" -murder movies put out by Shaw Brothers. In this one, a bunch of Mainlanders come to Hong Kong for a better life. Instead, these Mainlanders are jobless and wind up killing, robbing, and selling drugs for a Dai Lo. Tired of getting chicken scratch from their Dai Lo for all the work they've done, the Mainlanders (about 4 or 5) decide to do a big job for themselves by trying to rob a jewelry store. The heist goes awry with all the Mainlanders being apprehended by the HKRP. They all to go to jail and do their time and get discharged. Once out, the Mainlanders are getting "rubbed off" one by one and the HKRP do not have a clue. Luckily, one member, Yeh Hung (Lo Meng), of the Mainlander gang is still in jail who still has time. So, Inspector Wong (Jason Pai Piao) decides to cut Yeh Hung loose and let him walk the streets as bait to bring the killer out.

Inspector E.T. (Alex Man) investigates a murder case reported by singer Chu Szu Ting (Shirley Lui). The suspect, plastic factory owner Lu (Michael Tong) testifies and is acquitted. An important clue is later found and killer Lu comes to attack Szu Ting only to be stopped and killed by E.T. and his men. E.T., who has been estranged from his wife, tries different tricks to woo Szu Ting and eventually wins her heart. Her long lost father Chu Hung (Ku Feng), newly discharged from prison, intends to retrieve a hidden loot and tells her of his intention to join her. Szu Ting tells E.T. to probe his background when E.T. is injured and hospitalized. She takes her father to their former residence as ordered, but something there makes her suspicious of his identity. She spots him holding an axe and shouts for help when he is killed by someone sent by E.T. to secretly protect her.