Living in a small English seaside village, the Torridons are dependent upon their father's boatyard for a livelihood. When father becomes too ill to work, teenagers Jan and Ivor decide to launch a sailing school, an idea inspired by a letter from two American girls, Lucilla and Ruth Redvers. From the moment Lucilla arrived, it was plain to see her interest in sailing only concealed her real predilection for Torquil Torridon, an older brother. Ruth and Jan become friends, but tension increases steadily between the Torridons and Lucilla. To add to their troubles, financial problems threaten their ownership of the yacht. Jan's heroic effort to save Lucilla from drowning and the latter's assumption of more palatable qualities redeem the summer and indirectly the yacht. Reminiscent of a score of similar stories.