The movie is the third installment in the 'Hotel Transylvania' franchise and the sequel to the 2015 movie 'Hotel Transylvania 2'.
Taking place six years after the events of the previous movie, the story centers on Dracula, Mavis, Johnny and the rest of their family, both human and monster, and friends as they take a vacation on a luxury Monster Cruise Ship, where Dracula is at love at first site, with the ship's mysterious captain, Ericka, who is secretly the descendant of Abraham Van Helsing, the notorious monster slayer and Dracula's ancient archenemy. Now it is time for Mavis to be the leader of the "Drac Pack" and rally everyone up so they can stop Dracula, before it's too late.
Adam Sandler as Count Dracula
Andy Samberg as Jonathan "Johnny" Loughran
Selena Gomez as Mavis
Asher Blinkoff as Dennis Loughran
Kevin James as Frank/Frankenstein
Steve Buscemi as Wayne
David Spade as Griffin the Invisible Man
Keegan-Michael Key as Murray
Fran Drescher as Eunice
Molly Shannon as Wanda
Mel Brooks as Vlad
Sadie Sandler as Winnie
Genndy Tartakovsky as Blobby