Graham Marshall (Michael Caine), is a tired man that finds people around him are becoming more insufferable by the day. He anxiously awaited his promotion in an advertising company, when he learns that the undeserving Roger Benham (Peter Reigert) got promoted instead of him.Graham finally snaps. Frustrated that his hated life will never change, he cunningly concocts plans to take bloody revenge on everyone who brought him down, even his own nagging wife.