A sweltering summer spells bad news for the private detective business. Villains take the month off and the only swingers in town are on the 19th hole of the Royal Hoo Golf Course. The reputation of the Hoo is in trouble, however. Allegations of cheating have been directed at one of its leading members, Chris Porphyry. When Chris turns to Joe Sixsmith, PI, he's more than willing to help - well, he hasn't got any other clients - only Joe hadn't counted on being French-kissed then dangled out of a window on the same day. Before long, though, Joe's on the trail of a conspiracy that starts with missing balls, and ends with murder.