In Book One we're introduced to Andee, a young, curious and spirited boy living on an island. His parents, marine biologists, search the reef for new sea-life that could cure illnesses. Andee befriends two young dolphins, Tingo and Tango. One day a terrifying storm rips across the island and the waves pull Andee out to sea. In their dinghy, in the storm, his parents are lost forever. Tingo and Tango save Andee and he becomes one with his new dolphin family. Little does he know, however, he is the Chosen One. Special powers are given to him, allowing him to be one of the great and legendry Aquanauts of the Marine Kingdom; the Lost City.