JoJo and Gran Gran are on a day-trip to the sunny seaside with one mission in mind: to build the biggest sandcastle ever built; for Panda to play inside. But, JoJo has no luck with building her sandcastle and feels disheartened when she learns of the tide, and that it will carry her best-one-yet away into the sea! But with Gran Gran on-hand, JoJo learns that things don't need to last forever to be special as the pair take lots of pictures for them to keep forever and remember.