Rena is a married woman who is rarely without her headphones. Still unfulfilled after marriage, she retreats into music whenever she remembers the passion she once felt. Atsushi, a young convenience-store worker, becomes increasingly infatuated and obsessed with her until she is his sole reason for living. As admiration turns into madness and reality blurs with fantasy, an unseen gaze and unheard voice begin invading Rena’s private world of sound, twisting everything within the silence...