While on the island of Zanzibar Debbie pleads with her mom to go to Stone Town Market for some shopping. Marianne is reluctant to let her have the comvee but eventually gives in. Debbie, Eliza, Tyler and Darwin head to the market while Nigel, Marianne and Donnie go off to film in an ancient crater. Most of the shopping at the market is done by barter and they accidentally trade the comvee for a dress. The kids take off in pursuit of the merchant who is now driving their comvee to try and reach an understanding with him.