Storyline Taking place in the modern era,
Monsters Unchained introduces guests to Dr. Victoria Frankenstein, the great-great granddaughter of
Henry Frankenstein. Having taken over her great-great grandfather's estate, she has continued his work and has spent years working towards harnessing the power to control the monsters that reside in Darkmoor, attempting to remove the smeared legacy of the Frankenstein family name. After finally finding the answer to her "masterpiece" experiment, Victoria has invited guests to witness her taking
Count Dracula under her control by welcoming them into Frankenstein Manor and the Catacombs beneath Darkmoor.
Queue Guests first enter through the front gates that lead into Frankenstein Manor. Various references to Henry Frankenstein's work and legacy are scattered throughout the queue, including pictures of Henry and Elizabeth Frankenstein, assorted artifacts, lab equipment, crates of chemicals, dead bodies, and news articles from Darkmoor. The crypt of Henry and Elizabeth is seen, where Henry has been labeled as "Maker of Monsters" (as seen in
Son of Frankenstein). One room that guests walk through contains the body of the original
Frankenstein's monster, preserved in a state-of-the-art observation tank that periodically scans X-rays displaying Henry's internal work. The sign lists it as "Specimen: V1.0 - H. Frankenstein". As guests traverse deeper into the manor, continuations of Henry Frankenstein's studies done by his great-great-granddaughter Victoria Frankenstein are posted along the walls and in display cases. Through projector film footage, artifacts, and diagram writings, it is revealed that Victoria managed to capture the
Creature from the Black Lagoon, the
Wolf Man, and the
Brides of Dracula.
Pre-ride experience The first pre-show room introduces riders to
Ygor. Communicating over a television, he talks about the "Catacomb Navigation Unit" ride system while controlling a prototype model remotely. In the next room, Victoria introduces her version of Frankenstein's monster as a more improved version of the original monster. As the monster enters the scene, she informs him that the guests are friends to prove that her creation is not a "monster". She announces her greatest achievement and the culmination of her time and studies in Darkmoor as capturing
Count Dracula, whom she plans to take control of while guests ride the Catacomb Navigation Units. Briefly, she is interrupted by an attempt from Dracula to break free as his face is astral projected between two tesla coils. Victoria regains control and silences Dracula before sending guests out of the room. Guests then enter a room to store their belongings before following past a holding cell, where Dracula's coffin and references to other monsters' captivity are displayed. Continuing down a hallway crypt, guests are loaded onto the ride vehicle.
Ride experience As the ride begins, Ygor takes control of the Catacombs Navigation Unit and sends riders into the catacombs. The vehicle passes under a church bell that
Quasimodo rings. Upon entering the underground lab, the guests see an unmasked
Phantom of the Opera playing a pipe organ that shoots fire from its pipes. As Victoria begins her experiment, it is revealed that her creation is a conduit as the strong electrical surge passes through him to activate maximum power. Just as riders first see Dracula, he overpowers the machine and escapes, pushing the vehicles off course. The Brides of Dracula emerge from their coffins and attack under the orders of Count Dracula. Victoria Frankenstein and her creation fight off the Brides as Dracula unleashes the other captives. As the guest's ride vehicle is thrown deeper into the catacombs, they encounter
The Creature from the Black Lagoon and the Wolf Man. The Wolf Man pursues the guests to attack before Frankenstein's creation is able to subdue him using an electrical wire. The guests' vehicle then comes across the tomb of the Anck-Su-Namun containing the
Mummy of
Imhotep's late lover
Ankh-es-en-Amon. As she emerges from the sarcophagus, Dracula's voice echoes asking riders "Who's the true monster: The one in chains or the one who put us there?". Victoria appears telling guests not to listen to him as she fights off another one of The Brides and throws a torch to drive Ankh-es-en-Amon and the other two Brides off. Victoria orders Ygor to power up an artificial sunlight generator while riders confront Dracula amidst the chaos of the unleashed monsters. Using a reflective mirror, Frankenstein's creation reflects some sunlight to protect riders, referencing the original creation by exclaiming "Go! You Live!" As the catacombs begin to collapse, Dracula lunges at riders before being thwarted by Victoria and another reflective mirror before he can land. Victoria proclaims "All monsters will bow to the name Frankenstein" before Ygor says goodbye to the guests as he is swarmed upon by vampire bats. The vehicles are then brought back to the loading station. ==Voice cast==