JoJo and Gran Gran go swimming in a lido on a hot summer day. JoJo is excited to show Gran Gran what she has learnt in her recent swimming lessons, but when she loses her goggles, she isn't sure she can jump into the water. After spending more time in the pool with Gran Gran, JoJo learns to jump in without her goggles - making a big splash!

JoJo and Gran Gran bump into Ned and Monty as they walk along the canal. Ned invites them onboard to go on a boat ride, where JoJo gets to act as captain - on the lookout for treasure! They go past many locations along the canal, including a park and the zoo, before getting an ice cream! JoJo learns that people can live on boats.