Join your favorite monster family as they embark on a vacation adventure on a luxury monster cruise ship so Drac can finally take a break from handling everyone else's vacation at the hotel. It's smooth sailing for Drac's Pack as the monsters indulge in all of the shipboard fun the cruise has to offer, from monster volleyball to exotic excursions, and catching up on their moon tans. But they hit rocky waters when Mavis realizes that Drac has fallen for the mysterious captain of the ship, Ericka, who hides a dangerous secret that could sink their plans for a dream vacation.