Big trouble awaits the unsuspecting guests of the secluded monster resort after the exciting events of Hotel Transylvania 2 (2015), as the curly-haired son of Jonathan and Mavis, Dennis, now wants a puppy. Before long, grandpa Dracula grants the boy's fervent wish and gets his beloved grandson the playful but gargantuan puppy, Tinkles. Undoubtedly, every young monster needs a good pet; however, is the happy Dracula family prepared for the mess that comes with a giant monster dog?