It was supposed to be a digital detox in a sleepy Welsh village. Instead, twelve-year-old Josiah and his brother Nate are thrust into a war for an ancient technology hidden at the bottom of the ocean.
Separated from his family and trapped on a prototype submarine, Josiah discovers he has a unique connection to the terrifying creature guarding the deep.
With a ruthless enemy closing in and the pressure rising, Josiah learns that the only way to save his brother is to unleash the terror from the deep.