As captain of a destroyer in the US Navy, Merrill Kendrick plays a crucial and dangerous role in protecting the convoys that are essential to Britain’s survival in the Second World War. Despite pressure from his father to join the family company, a supplier of military radios, Kendrick chose to fight on the front lines of the war, a decision he’s never regretted. But when technical issues with his family’s Gatekeeper radios lead to devastating consequences in combat in the Atlantic, Kendrick needs answers. Joe Horiuchi, a second-generation Japanese American, gave up a prestigious future to fight in the merchant marine on behalf of the United States. Though he is faced with harsh discrimination, his brilliance with electronics proves invaluable. When his expertise is most needed, Horiuchi does not flinch in the face of danger—and he suffers the devastating consequences. Kendrick is a seasoned veteran when it comes to battle—but facing off with U-boats is nothing like facing off with his own father, who may be guilty of treachery. With the help of Horiuchi and his radio communications expertise, Kendrick must uncover the truth of his family business before more lives are lost.