In Sony Pictures Animation’s Hotel Transylvania 3: Summer Vacation, join our favorite monster family as they embark on a vacation on a luxury monster cruise ship so Drac can take a summer vacation from providing 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 the dream vacation 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 all of monsterkind.

Dom Cobb (Leonardo DiCaprio) is a skilled thief, the absolute best in the dangerous art of extraction: stealing valuable secrets from deep within the subconscious during the dream state when the mind is at its most vulnerable. Cobb's rare ability has made him a coveted player in this treacherous new world of corporate espionage, but it has also made him an international fugitive and cost him everything he has ever loved. Now Cobb is being offered a chance at redemption. One last job could give him his life back but only if he can accomplish the impossible-inception. Instead of the perfect heist, Cobb and his team of specialists have to pull off the reverse; their task is not to steal an idea but to plant one. If they succeed, it could be the perfect crime. But no amount of careful planning or expertise can prepare the team for the dangerous enemy that seems to predict their every move. An enemy that only Cobb could have seen coming.

During a preview tour, a theme park suffers a major power breakdown that allows its cloned dinosaur exhibits to run amok.