Recovering alcoholic Ken Randle seeks revenge on Terry Dyer, just out of jail, whom he believes killed his son Mark twelve years earlier, though Dyer has always protested his innocence, claiming the killer was Nick Fisher, who Mark caught having sex with his sister Sarah,then only thirteen. Then Nick Fisher is killed. His widow identifies Dyer as hanging around Nick's workplace but CCTV proves that he was some miles away at the time of the murder.
—don @ minifie-1