 When Kaptein Sabeltann and his men land on the mysterious island Gral, they are warned by the sorceress Miriam av Gral, that the lord of the island, Greven av Gral (the Count of Gral), is cruel and mad, and would like to replace Kaptein Sabeltann as the king of the sea. When Kaptein Sabeltann is captured by the "Vultures", servants of the Count, Pinky and Sunniva must put an end to the Count, by teaming up with Miriam av Gral.