Saki was released from juvenile prison to work as an undercover detective. In exchange for infiltrating the murky underworld of high school organized crime, her mother is taken off death row. Her alma mater is being taken over by three evil sisters and their powerful father. Her only real allies are a kid who shaves his head to attract women, a stoic detective who looks like he escaped from AREA 88, and the school principal who wears too much eye shadow