Dracula and his friends try to bring out the monster in his half human, half vampire grandson in order to keep Mavis from leaving the hotel. The Drac pack is back for an all-new monster comedy adventure in Sony Pictures Animation's Hotel Transylvania 2! Everything seems to be changing for the better at Hotel Transylvania... Dracula's rigid monster-only hotel policy has finally relaxed, opening up its doors to human guests. But behind closed coffins, Drac is worried that his adorable half-human, half-vampire grandson, Dennis, isn't showing signs of being a vampire. So while Mavis is busy visiting her human in-laws with Johnny - and in for a major cultural shock of her own - "Vampa" Drac enlists his friends Frank, Murray, Wayne and Griffin to put Dennis through a "monster-in-training" boot camp. But little do they know that Drac's grumpy and very old, old, old school dad Vlad is about to pay a family visit to the hotel. And when Vlad finds out that his great-grandson is not a pure blood - and humans are now welcome at Hotel Transylvania - things are going to get batty!

Dracula, who operates a high-end resort away from the human world, goes into overprotective mode when a boy discovers the resort and falls for the count's teen-aged daughter. In 1895, Dracula builds a resort in Transylvania, hidden from the humans, to raise his beloved daughter Mavis in a safe environment. In the present, the place is the Hotel Transylvania, where monsters bring their families to vacation far from the frightening humans. Dracula invites his friends - Frankenstein and his wife Eunice; Wayne and Wanda, the werewolves; Griffin, the invisible man; Murray, the mummy; Bigfoot, among others - to celebrate the 118th birthday of Mavis. When the party is ready to start, the 21-year-old Jonathan is walking through the forest and stumbles upon the hotel. Dracula sees Jonathan and disguises him as a monster to hide Jonathan from the guests. But Mavis also sees Jonathan and Dracula forces him to pose as a monster. Soon Mavis believes that Jonathan is the "zing" of her life despite the advice of her father about humans.