Corporate mogul Harlow Bissenger Bancroft commanded a battery of lawyers, but they were no help when a blackmailer threatened his family. "There are many ways of dealing with a blackmailer," Perry Mason told him, "but only one should concern you—tell him to go jump in the lake." Shortly afterward, the body of the blackmailer was discovered on the lake...on a yacht...with a bullet through its heart. We haven't been able to find out where anyone's stepdaughter comes into the mystery...

-IBList synopsis from several inadequate sources