Sea, ships and saltwater flavor this fast-moving mystery-adventure for boys. When Rock Ide, son of a captain in the U.S. Merchant Marine, worked under Captain Anderson on the East Coast of Florida, he learned a great deal about navigation and sailing. This know-how comes into play when Rock and his friend Danny trace Captain Anderson -- believed shanghaied- and run into a treasure mystery. The boys' knowledge of hurricane behavior helps locate the treasure. A chase, a race against time, and plenty of sailing.