Sony Pictures has released the first full trailer for "Hotel Transylvania 2". The trailer gives fans idea about the plotlines which center on how Dracula (voiced by Adam Sandler) teaches his half-vampire half-human grandson, Dennis, AceShowbiz reports.

The trailer opens with Drac singing a lullaby to his grandson with his own lyrics. Drac is so happy to have a grandson although he is not purely a vampire. "Ever since Jonathan and Mavis have a little monster, I've been the happiest vampire in the world," Drac says.

Drac worries about losing his grandson when Mavis (voiced by Selena Gomez) tells him her plan to raise Dennis in a safer place. Trying to make Dennis stay with him, Drac attemps to bring out the fangs in Dennis. He trains his grandson to be a real vampire with the help of his father, Vlad, and his spooky buddies by sending Dennis to a "monster-in-training" boot camp. While Drac is busy developing Dennis' monster side, Mavis gets a real taste of the human world while visiting Jonathan's family in California.