Airplanes have been vanishing from the sky! Even stranger, rumor has it that the disappearing aircraft have been turning into giant carp. Meanwhile, a freelance detective investigates a run-down apartment on the outskirts of town, where he finds a middle-aged man and a young girl with a penchant for fish. Unable to identify the two, the investigator enters their room, only to find it empty save for a document that reads, "This story has been prepared for you, my successor... who should be visiting this room in due time."