In Robert Louis Stevenson’s haunting and introspective short story “Markheim,” a chance encounter on Christmas Day leads to a chilling exploration of morality, free will, and the struggle between good and evil. With gothic atmosphere and philosophical depth, Stevenson crafts a psychological tale that lingers long after the final page. A masterwork of Victorian horror and spiritual suspense, 'Markheim' invites readers into the dark recesses of the human soul.