A derelict freighter found drifting in the English Channel triggers a high-stakes investigation into maritime insurance fraud and human survival. The protagonist, John Sands, discovers the abandoned ship, the Mary Deare, only to find her First Mate, Higgins, still aboard and struggling to keep the vessel afloat. As they navigate the physical dangers of a sinking ship and the treacherous weather of the Channel, they are forced to confront a conspiracy that threatens to bury the truth of the ship's final voyage. The narrative unfolds through a tense, first-person perspective that emphasizes the claustrophobic atmosphere of the decaying freighter and the mounting pressure of the subsequent formal inquiry.

This novel is widely regarded as a quintessential example of the maritime thriller genre, praised for its technical accuracy and relentless pacing. Readers often highlight the author's ability to transform a decaying freighter into a character of its own, imbuing the vessel with a sense of impending doom. The narrative's shift between the harrowing events at sea and the clinical environment of the courtroom creates a compelling contrast that keeps the stakes high throughout the story. The work remains a standard for those interested in mid-century adventure fiction, noted for its grounded realism and lack of unnecessary melodrama.