The Robinson’s are playing pirates and Captain Dadbeard and his shipmates Biff and Kipper have hidden special treasure somewhere in the house. But when Gran’s brand-new birthday earrings go missing, they discover that this treasure might be even more special than they realised – Gran’s earrings have been hidden with the treasure! With Gran on her way, Cutlass Chip and Captain Nadim have to put their pirate skills to the test to solve Captain Dadbeard’s treasure map and save Gran’s birthday party.