Ruth Fielding at Lighthouse Point

As the school year draws to a close, Ruth and her friends plan a trip to Lighthouse Point with Jennie "Heavy" Stone. Mary Cox makes a point of telling Heavy that she has been slighted and that only members of Ruth's club are invited to go on the trip. At Ruth's insistence and under the other girls' protests, Heavy invites Mary along on the trip. On the way home after the last day of school, Mary Cox slips and falls off the boat into the water. Ruth saves Mary, who cannot swim, from drowning...