"Tim, Belinda, Ferkle, and Princess Grace were headed to their doom...until a mythical sea creature came to their rescue. But in exchange for saving their lives, Princess Piscina needs them to bring back something very precious to the Kingdom of Merland: the trident of her father, King Neptuna. To do so, Tim and his friends must embark on a very dangerous journey across the Sea of Terror to the incredibly amazing city of Atlantis. On the way, they'll have to confront vicious beasts, treacherous pirates--and worst of all, their evil nemesis, Prince Ruprecht"-- Back cover.