The Armed Detective Agency takes on a perplexing case that leads them to Standard Island, an enigmatic man-made city and luxurious resort near Yokohama. However, the detectives soon unravel a web of complexity involving a bomb, time manipulation, and a enigmatic individual with extraordinary abilities known as H. G. Wells. As the investigation deepens, the fate of Yokohama hangs in the balance. Will this enigmatic case mark the demise of the city?