Don Winslow of the Navy #18

Don Winslow leads a naval convoy effort to rescue ships lost in battle, with PT boats engaging the enemy and two remaining battleships seeking shelter at Mokoni Island. After the submarine convoy completes its mission without incident, Don investigates a mysterious note brought by a woman named Betty, who claims to have information but is reluctant to reveal her source. Don and his men pursue the lead to a warehouse, suspecting Betty may be involved in espionage or sabotage, as they work to uncover the truth behind her cryptic message while maintaining security at their naval installation.