When lightning strikes a tree outside the Hollister home, it falls on a car, and the children help the injured driver get out. The young man, Tom King, is on his way from Hawaii to Boston. He tells the children that he is searching for a ship captain's log that may prove he is legally entitled to a large inheritance. The only clue he has are sketches of an unidentified clipper ship which he hopes to find. The children offer to help, of course,...