The All-domain Anomaly Resolution Office solves both familiar modern incident and bizarre and incomprehensible cases that can’t be explained even with cutting-edge science in this orthodox mystery drama that will keep viewers on the edge of their seats.

One day, Koyume Amano, a member of the Tokyo Metropolitan Police Band Color Guard, is suddenly ordered to go to the All-domain Anomaly Resolution Office, or AARO for short. When she arrives at their headquarters, which resembles the office of a shrine from the outside, the deputy director, Miyabi Okitama is there. According to Okitama, the AARO is the oldest investigative agency in the world, dating back to the time of the Yamato Imperial Court. They report directly to the Cabinet Office, and investigate “unsolvable cases” such as paranormal phenomena. Koyume is surprised to learn that such an organization exists, and also wonders why she would have been assigned to it.
At this point, Okitama tells Koyume about the Spiriting Away Incidents that he is currently investigating. The first incident happened about half a year ago. The only things left at the scene were the victim’s clothing, their possessions, and copious amounts of blood. No body was found, as though it vanished on its own. Online, there was someone who claimed responsibility, saying, “This was a spiriting away,” and, “I am the god Hiruko.” The incident was followed by others like it, and Hiruko put out a statement each time. Gradually, people came to believe in, fear, and some even worship Hiruko.
Under the orders of AARO director Tamio Ukino, Okitama and Koyume go to the First Investigation Division of the Tokyo Metropolitan Police to take part in a joint investigation. There, they learn about a key figure named Rui Matsumiya. He was originally a member of an underground male idol group, but started making money by dating his fans after the group broke up. Out of eight disappearances that have happened so far, Matsumiya was the first to discover the scene in the three most recent, and the victims in all three cases were passionate fans who had repeatedly gone on dates with him. However, at the times of the crimes, Matsumiya was working in a shared office, and the security camera footage backs up his alibi. After the first incident, Matsumiya began to talk about being able to see Hiruko, which caused a stir online. Is this case really the work of the god Hiruko? Or is it someone else in the shadows? What answer will the Okitama and the others find?!