The monster family boards a luxury cruise ship so Dracula can take a summer vacation from the hotel. It's smooth sailing for the pack as they indulge in all of the fun things the cruise has to offer, including monster volleyball, exotic excursions and catching up on their moon tans. However, the dream vacation soon turns into a nightmare when Mavis realizes Drac has fallen for the mysterious captain of the ship, Ericka, who hides a dangerous secret that could destroy them all.
