Molly examines her shelf of special things at the back of Mack's stall. She chooses the homemade jellyfish and remembers the day she got it... \n\nBob is about to start his deliveries for the day, but his van has broken down. Molly and Mack agree to help deliver things, but when Mack delivers some boxes of cakes to Mrs Juniper's cafe, the boxes turn out to contain fish! Meanwhile, Bob and Molly deliver some fish to Colin at the chip van, but when Colin opens up the box he finds cakes inside. Mrs Juniper gets a call from Colin saying there has been a mix-up and he has received her cakes. They both agree to sell each other's food and split the profits, so the kids set about turning the Wobbly Coffee Pot into a fish shop.