Centered on Southeast Asia, female investigators who were investigating the "Black Head", a heinous criminal organization that trafficked people to sell organs and sell them to prostitution organizations, are sucked into the darkness one after another. and was missing.Senior administrator Amamiya (Kimika Ichijo) takes charge of the case of missing investigators.Will Amamiya fall into a trap, and will she be dropped into the abyss of Hell's iron shackles?