Yet another entry in the "psychotic killer on the loose" genre. The premise of this one is somewhat original, but apart from that it has nothing else to distinguish it from dozens of similar films, so you're just sitting there waiting to see how it will tie everything up in the end. It does come up with an unexpected, out-of-left-field plot twist, but the "motivation" part is fumbled. Still, if you're tolerant of low-budget early-80s thrillers, you'll probably have an OK time. (**)