Nana is an undercover agent working to expose the sinister conspiracy of an ominous organization hidden within a run-down office building. To locate their hideout, she has been working as a bartender at a girls' bar beneath the building, waiting for the perfect chance to infiltrate. Finally seizing her opportunity, Nana sneaks toward the hideout—only to find a guard on watch. What follows are one after another intense tickling torture sessions... Will Nana be reduced to helpless, uncontrollable laughter and fail her mission!?