Wren Sutherland is the best healer of the Royal Guard. But one mistake almost led to her death and cost her everything that was dear to her. Wanting to atone for her guilt, she goes to Colwick Hall, where the secluded estate of an eccentric aristocrat is located. He asks her to cure his servant of a mysterious serious illness.

This dark place keeps many secrets. His guests have to follow strict rules: do not leave their room after dark and under no circumstances leave the mansion without permission.

Suddenly, Ren learns that her patient is not a simple servant, but Hal Cavendish, the ruthless murderer and sworn enemy of the kingdom. Soon, inexplicable, chilling events begin to occur, and Ren decides to unravel the secret of Hal’s terrible illness at all costs.