Mariko, a bartender who runs a small bar "CURL MALL" in the side streets of Shinjuku's Kabukicho, has an extraordinary memory and keen observation skills, but also has the dream of becoming Japan's most powerful private detective. One ordinary night, an agent claiming to be the American FBI entered the bar and gave her the first detective commission in history. Unexpectedly, she was to find aliens lurking in Kabukicho!