An incident involving 70 grams of polonium stolen from the Nuclear Fuel Development Corporation. Riko Kirimura (Sara Tsukigami), an investigator from the Public Safety Commission, is ordered by the international secret organization Valis to conduct an investigation and infiltrates Valis Japan—a facility operating undercover as a private clinic. She successfully changes the password on a mini nuclear bomb device intended for detonation, but soon uncovers a deeper conspiracy lurking behind the scenes. A tense story unfolds, entwining secret organizations, personal conflicts, and the true identity of the real enemy.