A keen observer of human nature, Art watches happily from his bedroom window as the beautiful girl in the flat opposite argues with her lover. But when she disappears and he works late into the night with a circular saw, Art comes to the only logical conclusion. It has to be murder. He wanted the relationship to end, but not like this. Jones wants to call the police, but first they need evidence. And there's only one place to look. Under the watchful eye of Jones, Art breaks into the flat opposite, only to return as clue-less as before. They resort to plan B and try to lure the killer out into the open. It works better than expected: they manage to lure him around to their flat...