Oscar Shtaufenberg holds the position of senior inspector in Helix, a World Health Organization-affiliated entity focused on military conflict monitoring and societal stability preservation. Thirteen years after the initial suicide pact of Tuan Kirie, Miach Mihie, and Cian Reikadou, Oscar uncovers Tuan’s engagement in drug smuggling during her deployment in Niger’s warzone, triggering Tuan’s immediate recall to Japan. Concurrent with Tuan’s return, a worldwide mass suicide event erupts. Oscar designates Tuan to head the investigation into this incident, charging her with identifying the responsible terrorist organization. Throughout the inquiry, Oscar maintains close surveillance on Tuan’s progress, personifying the institutional authority of the Admedistration’s oversight and control mechanisms.