Markheim by Robert Louis Stevenson

On Christmas Eve, a man enters an antique shop under the guise of buying a gift but instead murders the shopkeeper. As he searches the house for valuables, a mysterious visitor appears and challenges him to reflect on his choices. The plot turns into a psychological and moral struggle between good and evil. Stevenson explores conscience, redemption, and free will. A dark, suspenseful tale with a spiritual undercurrent.