Victorian seamstress Mary is sent by her father to the mansion of Lord Burrows to be married. She finds a house full of monsters. At night the castle comes to life with a luminescent glow and buzzing insect sounds. The maids grow wings. The footman turns tall, elegant and green. The master of the house no longer resembles a man but a long and spindly creature. A decades-old spell becomes apparent, one only Mary can break.