In the dim candlelit halls of Harrington Manor, Lady Eleanor Harrington decides to break her years of seclusion by inviting Dr. Archibald Thornton to conduct a groundbreaking experiment. The manor, cloaked in perpetual mist, is said to hold the key to unlocking the mysteries of life and death. Driven by an insatiable curiosity, Dr. Thornton accepts the invitation, unaware of the haunting secrets that await him.