Siblings Piper and Percy are young pirates, living on a pirate ship with their pirate mother and father. Every day is an exciting new adventure, sailing the high seas! The pirate kids are visiting their grandparents' ship while their parents are on a treasure hunt. Grandpa Jabber Joe is supposed to be giving them a shark-catching lesson, but he's lost the trusty hook he needs to teach them! Piper and Percy help him look for it, but there's a lot of clutter on the ship!