Something lurking in the sewers is eating Eleanor City residents. Much to the chagrin of the Tower Chief, the Dirty Pair are back to save the day.

Sakurako Yorozuya may look like an ordinary young woman, but she's actually the head of a giant corporation! Kei and Yuri have been assigned to protect her, but babysitting this naive, high-society princess turns out to be a royal pain in the rear.