During a routine submarine dive, oceanographer Laura Daughtery discovers an unknown life form and unearths a government cover-up operation led by scientist Dr. Aleksander Cirko. Meanwhile, Louisiana fisherman Richard Beck loses his brother in a suspicious diving accident, and a young boy named Miles sneaks an unusual aquatic egg into his home. From the South Antarctic Sea and the Gulf of Mexico to San Diego and Monterey, there's something lurking beneath the Surface.