The story is set in the South Pacific islands. The grandmother of a chief’s daughter "Moana" is telling a legend to the children: at the beginning of the world there was only a vast ocean, until the mother of the ocean "Tafiti" came to the world to create Everything. However, there are bad guys who want to steal Tafiti’s heart and want to gain the power to create all things. One day, the demigod "Maui" holding a magic fishhook crossed the vast sea to Tafiti’s island and successfully stole it. Tafiti's heart. The heartless Tafiti began to disintegrate and release a terrible darkness. When Maui ran away, he encountered another demon who also wanted to steal his heart, "Theka". Maui was shot down from the air and disappeared without a trace. And his magic fish hook also sank into the sea with Tafiti's heart. Until now, after a thousand years, Theka and other demons are still looking for the heart, and the darkness hidden in the shadows is still spreading everywhere, drying up the life of the islands until the world collapses. But before that, someone will find that heart, and she will set sail with Maui through the vast sea to return to Tafiti's Heart to save all mankind.