The Locksmith Killer. Daniel Boisett (Robert Hossein) and his friend Paul Genest (Jean Sorel) are disturbed by the home owner during an attempted safe-cracking. In the ensuing mêlée, Paul accidentally kills the home owner and both men flee the scene in panic. Paul manages to escape but Daniel is shot and wounded by police and is promptly sentenced to a lengthy stint in prison. Fourteen months later Daniel manages to escape and while out walking on the road he meets up with Thomas (Georges Wilson), who after the pair quickly become friends, offers him a job at the Mountain Relay Station ...