The 3rd book in the Martha's Vineyard series. A houseboat is found ransacked and adrift in the Martha's Vineyard bay, the Coast Guard suspects foul play. The occupant of the houseboat is missing. Who is the boat's owner and what happened to him? Many people in town report having seen a man on board with his dog, but no one seems to have so much as a guess as to his identity. Phyllis cannot resist investigating. She finds clues that tie a member of her family to the case. Can she find answers before she, too, is the subject of a missing person report?