Shiro becomes obsessed with detective work after stumbling upon the ghostly abode of his childhood television hero, detective Jubei Yagyu. In flashbacks evoking the campiness of '70s Japanese television, Shiro reminisces about the man's deeds and almost superhuman capability for solving mysteries. However, after Shiro's own detective agency opens for business, he and his Watson-like partner Mio find themselves bored of being hired by neighbors for the occasional odd job. They crave a real mystery worthy of Jubei. The film's weirdness suddenly rockets ahead when a mystery begins to take shape at last. The men in the town are acting strangely, and Shiro's neighbors might not be as innocent as they appear. As the surreal underbelly of Japanese suburbia exposes itself, Shiro and Mio spring into action and embark on a fantastic adventure.