When Gran announced that she wanted to spend her vacation cruising along the French Riviera, I should have known it was a sign of things to come. Before long we, too, temporarily relocated to France, to conduct an undercover investigation into a blackmail attempt targeting Odelia's cousin. A marriage had been arranged and was going to take place between Emily King, Zumba instructor, and Harry Griffiths, scion of the well-known Griffiths family. Only someone aboard the Griffiths luxury yacht was desperate to stop that wedding, and would go to any lengths, up to and including... murder!