A year has passed, what seems like a normal day completely changes everything. Something dormant within Johnny awakens, something that will send his life spiraling to chaos. Meanwhile, within the unscratched corners of the world, another being prepares to return and bring forward a future that threatens the very existence of monsters.

Many years after Hotel Castaway and Hotel Transylvania 2, Mavis and Johnny travel back to the islands that separated them for years on a vacation allowed by the king of the sea, Poseidon. What happens to them there they wish they never came back.

Johnny takes Mavis back to Hawaii for a second time for a huge surprise. On their way back to the Hotel, the plane goes down. Dracula finds out and creates a search party for the couple. Will he find them in time? Will the couple survive and will this accident strengthen their love or break them apart?

Death doesn't always have to be simply seen as something that happens to everyone, or as something emotionally painful. Some things happen for a reason, & not everyone goes in vain. Fate has something to teach when one of the Straw Hat pirates passes. R&R