A series of mysterious building bombings has occurred on MultiEarth A0073. Patran, who has successfully passed Gavan’s tests, is fired up to solve this case and earn himself a major achievement. When he rushes to the scene, he finds not only the First Investigative Division there, but also Reiji and Date from the Records Division for some reason... Just then, a new bomb threat arrives from the culprit. With the deadline approaching and neither the culprit nor the bomb in sight, Patran makes “a certain decision”…!