While visiting a wax museum, Mortimer accidentally finds a string of pearls in the dummy of Napoleon. Mortimer and Charlie give the guard the pearls, only to later find out he is part of a jewel-smuggling gang. The pair are captured and imprisoned in the gang's hide-out in an old house, but manage to escape. The police don't believe their story, so Charlie and Mortimer come up with their own plan to capture the crooks.; Charlie and Mortimer have to baby-sit a lady's pet gorilla for an afternoon.; Mortimer trades a cow for a broken-down lunch wagon.; Mortimer uses a number of reminders to jog his memory.