It's a perfect plan for a robbery. A man on a bicycle gets in the way of an armored truck carrying eighty thousand pounds in old notes. He falls, and the men in the van's cab get out and pick him up. Meanwhile, two of his accomplices get into the truck with the money, while the fourth threatens the guards in the cab. Only... the guards where the money is try to fight back, one of them calls out Peter Reynolds' name, and one of them is slugged, and later dies in hospital. Meanwhile, back at headquarters, planner Peter Elliott makes a pass at Reynolds' girl, Lisa Gastoni. She rebuffs him, but the phone rings, and she picks it up and asks if Reynolds is all right and the job went well. It's not Reynolds, but batty Olive Sloan, trying to phone the veterinarian for her dog.
The rest of the movie proceeds at a clip that is dependent on Miss Sloan figuring out that she has a clue and what number she dialed. The result winds up being more an anecdote than a story, even if Elliott and Miss Sloan give memorable performances.