Tsubaki, a full-faced rider dressed in black leather top and bottom, is a female bounty hunter who roams from town to town. In a small country town where pachislot is the only entertainment industry, she plans to make a huge amount of money by participating in an annual pachislot tournament. However, he is upset when he finds out that one of the contestants is Higaki, a man he used to date... The two have a past they want to forget....