With his children and grandchildren, and harmonious family and friends, the vampire Count Dracula (voiced by Adam Sandler) is enjoying the best time of his life. However, after the hustle and bustle, he also fell into deep loneliness, and it seemed that the cold count began to look forward to a beautiful love. The considerate Mavis (voiced by Selena Gomez) saw through her father's mind, so she took her family and friends on an unexpected journey full of surprises. On the monster cruise ship in Bermuda, Dracula met the beautiful human captain Erica (voiced by Kathryn Hahn). He fell in love with this beauty at first sight, but he didn't realize that the other party came from the mortal enemy Van Helsing family. Abraham Van Helsing (voiced by Jim Gaffigan), who has been fighting with monsters for hundreds of years, intends to use this once-in-a-lifetime opportunity to catch his mortal enemy Dracula and his companions in one fell swoop...