Michael Redgrave "Peter" works by day on a building site, his wife "Pat" (Patricia Roc) works by night as a switchboard operator - they are saving up so they can, hopefully, stop living like ships that pass in the night. On his way to work one day, he is certain that he spies a brutal murder from the window of his train. Enlisting the help of the police, he arrives at the apartment of Paul Lukas, the almost maniacally possessive "Zoltini" and his young wife "Vivian" (Sally Gray), a magical duo who insist they were just rehearsing for their latest stage act. So no crime committed... yet!? It's g...