Love and Blood(1972)

Hong Kong 1972. Shiu Pang is a poorly paid photographer with a very jealous fiancee. One day he meet an innocent girl and he falls in love with her. His fiancee decides to give a lesson to the young girl by sending a bunch of youngsters beating her and things goes worse and worse, the photographer's best friend dies in fighting the gangsters and the girl loses his mind, ending up in an asylum.