After a shocking murder, authorities are left puzzled when they discover the attacker, found at the crime scene, had been dead for three months. Amidst the chaos, journalist Jin-hee organizes a live interview with an anonymous caller who insists he is the real murderer. As he ominously predicts three more killings by the undead, Jin-hee plunges into a chilling investigation that forces her to confront malevolent forces that defy explanation. With time running out, she must unravel the dark mystery before it claims more lives.