Scooby-Doo and the gang are on the island of Bimini in the Bahamas to investigate a report that the lost city of Atlantis has been found--and the reader must choose the path their investigation will take, and how they will respond to the dangers that lurk underwater for anyone who seeks to find the lost civilization.

"Thirteen-year-old Arthur Curry has enough troubles to sink a ship. His mom left him and his dad when Arthur was only three years old. He doesn't fit in with the other students at school. To them, he's just "fish boy," a weird, freaky kid. But Arthur has a secret. Something so secret, even he doesn't know what it is. Yet ... With the help of his only friend, Claudia, Arthur will begin to learn the truth about his mother, himself, and a legendary world...