A Mancha do Passado (1971)

After doing 13 years in prison for the murder of his wife, mechanic Harry Graham is out on parole and looking to rebuild his life in a small seaside community. He settles into a trailer park and finds both a job and a girlfriend. But things get difficult for Harry when his estranged son, Jimmy, shows up. He witnessed his mother's murder as a child and, after years spent in foster homes, has come looking for revenge.