Four for All (1974)

When Joseph Kevis, mafia boss of Istanbul, learned that his former colleagues wish to challenge his leadership, he just killed them and replace them with loyal people. Tony and Olga, one of the few survivors decide to take revenge Kevisu and his murderers. A bunch of criminals tries to hide in a rich man's house. They rape and kill his wife in front of him and kick his child like a ball. Then they go away. Our hero will find three old friends and the four together they get an act of bloody revenge.