Dr. Blowhole's hated cousin, Professer Dorsal Fin, has came to join the leage and quickly earn status in the leage as leading all-time head sciencetist. he earned trumedus respect to all leagers. Blowhole can't stand it! cause of this, Blowhole intends to pull off something risky, even to the strongest leagers: defeat Ignitus all by himself. Blowhole's hatred for his cousin pushed him to an extreme limit! can the lougers prevent this mad dolphin from winning, but at the same time, prevent a horrendus doomsday machince created by Dorsal Fin?