After the mysterious death of a wealthy ghost hunter, Cyrus Kriticos, his estranged nephew Arthur Kriticos inherits a strange glass mansion. Arthur, a widowed father, moves in with his two kids and their nanny, only to discover that the house is actually a machine built to open the Eye of Hell—powered by 12 trapped spirits.

Each ghost has its own tragic backstory and grotesque appearance. As the family explores the house, they realize that the walls are constantly shifting, and the ghosts begin to roam free. With the help of Dennis Rafkin, a psychic, and a ghost liberator named Kalina, they try to survive and uncover the truth behind Cyrus’s sinister plans.