After a gifted musician inherits a mansion after her long lost father dies under mysterious circumstances, she discovers his last musical masterpiece riddled with cryptic symbols that unravels an evil secret, triggering dark forces that reach beyond her imagination.

A live streamed, publicity stunt, filmed inside London's most famous scare attraction takes a terrifying turn as the event awakes an evil spirit. Something relentless and seemingly unstoppable starts stalking the celebrity guests through the claustrophobic halls of this maze of terror.