As Tony and Roger prepare for a vacation in Rome, a packing case is delivered to NASA. Dr. Bellows tells Tony it contains a safe filled with experimental equipment, due to be sent to the moon. Then Jeannie arrives. Tony hears someone coming and orders her to disappear. She pops into the safe and is accidentally locked in. She tries to turn into smoke, but still can't get out. Tony and Roger work frantically to free her, until they find the safe will explode if anyone tampers with it.