Committed to public service and the pursuit of truth, Takahashi Yashiro joins the Criminal Investigation Department as an inspector under the Sibyl System. As a series of violent cases expose the fractures beneath Japan's enforced order, Yashiro draws the attention of Kasei Joushuu, who becomes increasingly intrigued by a mind the system cannot fully define. Set during the events of Psycho-Pass Season 1. Prequel: Psycho Pass Track to the Abyss (one-shot)