Popeye, as the custodian of a museum, gets involved with a picture-snatching thief (Brutus) and a dinosaur that keeps falling to pieces (Eugene the Jeep likes the bones). Olive helps Popeye put the dinosaur together. Professor O.G. Wottasnozzle orders Popeye and Jeep to guard a $100,000 painting that Brutus attempts to steal. With the help of Jeep, Popeye captures the thief (after a chase through the museum) and saves the painting for Professor Wottasnozzle.