Set in September 1939, Dangerous Crossing follows Lily Shepherd, a former chambermaid, as she boards a cruise liner bound for Australia, seeking a new life. The voyage, filled with cocktails, jazz, and glamorous companions, soon takes a darker turn as long-hidden secrets surface. Trapped in the confined space of the ship, tension mounts, and it becomes clear that a killer is on board. The story unfolds with a blend of intrigue, class dynamics, and suspense, reminiscent of Patricia Highsmith's works.