As a five-year-old boy grieving his father’s death, Phraphai created—or perhaps met—an imaginary companion named Klong. After moving away, Klong disappeared. Twenty-two years later, Phraphai is a neurologist living alone when Klong suddenly returns, no longer behaving like an imaginary friend: he can touch, leave marks, become jealous, and frighten other people. Their reunion grows into intimacy as Phraphai struggles to determine whether Klong is a ghost, hallucination, supernatural lover, or something rooted in his own damaged memory. The apparent haunting ultimately draws on Kleine–Levin Syndrome, epilepsy, childhood trauma, and shared consciousness, transforming paranormal romance into a medically grounded mystery about loneliness, grief, and the human need to be seen.