Following on the heels of "Stalker," this title continues the same theme, focusing on a young woman, Suzu, infatuated with her older sister's husband, Takeshi. As a neuro-psychiatrist, Takeshi has the expertise to diagnose her mental instability, but trying to care for her may only draw him further into her clutches. Looking into the mysteries of her childhood may be his only hope of curing her obsessive behavior before Suzu's violent tendencies threaten those around her.