Margot has won a trip for two on a cruise ship, and she takes her best friend Nancy along. Of course, Margot couldn't go anywhere without sneaking Odds on board the ship. Odds wouldn't be himself if he wasn't giving poor Margot a hard time. Someone has murdered the captain of the ship, and Margot and her friends are stuck out on the ocean with the killer. Nothing to do except to solve the mystery. The stakes are higher this time around because Margot will foil a kidnapping, make a hard choice that will change her life, and learn once and for all if she's really hearing Odds' voice.