When the luxury liner SS Normandie catches fire in New York Harbor, naval architect Steven Gates discovers the disaster is a calculated act of sabotage by a Nazi operative. Gates must navigate a high-stakes game of cat-and-mouse to unmask the spy before further destruction occurs. As the investigation leads him into the dangerous, submerged depths of the ship, he finds himself entangled in a psychological struggle that threatens both his mission and his personal life. The narrative follows Gates as he attempts to outmaneuver an elusive enemy while protecting the woman who holds the key to his survival.

This novel is characterized by its meticulous attention to the historical details surrounding the tragic end of the SS Normandie. The narrative relies on the tension inherent in the espionage genre, pitting a civilian expert against a trained operative in a claustrophobic setting. Readers likely appreciate the blend of technical naval knowledge with the suspense of a pre-war thriller. The story functions as a focused character study of a man forced into a conflict far beyond his professional expertise, emphasizing the personal cost of wartime intelligence operations.