Some time after the events of the first film, Mavis and her fiancé Johnny are finally married, with the approval of her father Count Dracula, and the world becomes aware, and unafraid of the existence of monsters after the shut down of the monster-hunting organizations and groups. A year after the wedding, Mavis reveals to Drac that she is pregnant and later gives birth to a baby boy who the couple name Dennis, nicknamed “Dennisovitch” by Dracula.
As Dennis’s fifth birthday nears, he has yet to grow his fangs, and Drac worries that his grandson might not gain vampire powers. Noticing the potential dangers her son might face living in Transylvania, Mavis starts to consider moving to California, Johnny’s hometown, to give Dennis a more “normal” childhood, much to Drac’s disapproval.
Drac tells Johnny (who does not want to leave the hotel either) to bring Mavis to California to visit his parents, Mike and Linda, but to make sure to keep her distracted so that she will not move, leaving Drac to “babysit” Dennis. Drac enlists his friends Frank, Wayne, Griffin, Murray, and Blobby to help train Dennis to become a monster, but everything he tries fails.
