In an action-packed adventure unfolding on a fictional southern island in the Indian Ocean, the nefarious group known as 'White Snake' kidnaps Shinnosuke and Prince Sunnokeshi from the Buri Buri Kingdom. Mistaken for one another, the two captives hold the key to the kingdom's coveted hidden treasure concealed within the underground golden palace. As Shinnosuke's parents, Hiroshi and Misae, join forces with Lulu, the palace guard's esteemed leader, they engage in a fierce battle against White Snake to rescue their son and the prince.