In the coastal town of Sandsborough, the pirate family Blunderbuss has fully integrated in the community. But the village is turned upside down when the ninjas move in next door. After all, pirates and ninjas are sworn enemies! While pirate captain Hector tries everything in his power to get rid of his new neighbors, his son Billy and ninja daughter Yuka grow closer. The pirates decide to challenge the ninjas to fight their ultimate battle at the yearly village games. Who will win? Ninjas are faster and more flexible, but pirates are the best cheaters in the world...