For thousands of years, people from various nations and cultures have feared them. The humanoid rulers of the Ocean. They're the ones behind the legends of Mermaids, Mermen, Fish-People, Rusalka and many others. The Billion-Dollar luxury Cruise Ship Amphitrite leaves Boston with 7000 souls onboard. Captain Heidi Quinn, her lover Gordon Scott and their stalwart comrades, Egyptian seawoman Soraya Sadat and Haitian newcomer Arthur Guerrier, embark on the adventure of a lifetime. This is a few years after the Titan Submersible Incident. People are learning to love the ocean again. In the Deep, the creatures of myth and legend are frighteningly real, and blessed with a terrible intelligence. The Horde of aquatic humanoids targets the Amphitrite and its delicious passengers and crew. Even more terrifying ? They're led by the Queen of the Oceans !