Londoner Harry Fabian is actually a second-rate con man. After years of setting up using Harry's approaches, Mary, his girlfriend, becomes completely fed up when she is tapped by him for another mortgage. His latest ploy, boosting an aging Greek wrestler, goes awry everybody points the finger at Harry and if the wrestler dies. Since the underworld shuts in, hiding out in a riverfront barge, Harry sees his grand ambitions spiral in to a nightmare of fear and despair.