Ayame Kido has spent her career as a commemorated Speech Therapist. But when she accepts a quiet posting at a remote speech clinic, she''''s unprepared for a child, a mute boy who suddenly utters chilling, violent phrases in the voice of a dead man. Haunted by guilt from a past tragedy, Ayame becomes entangled in a mystery that connects her patient to a long-forgotten cold case, exposing a web of ritualistic abuse and generational trauma.