A musical mystery on the high seas, as bumbling (or is she?) French detective Peugeot tries to ferret out the culprits from a host of finalists in the "National Devil's-Food-Cake-Mix Devil's Island Treasure Hunt." Before there is time to vote the first team off the yacht a crime is committed on board the yacht, and the audience is enlisted to help decipher a mysterious series of clues and to choose the criminal from the possible suspects - the ending changes nightly.