A cunning thief by the name of Winter Firefly is raiding jewelry stores all over town while continually evading any security measures set up by the police, frustrating the Chief to no end. Therefore it comes as a blessing that he is lately seeing a beautiful woman with whom he feels completely at ease. With Toshio being pressured by his boss around the clock to catch Winter Firefly, Cat's Eye refrains from stealing their next objective, the "Dragon's Eye", upon Hitomi's request. But when Winter Firefly ends up stealing the gemstone, Cat's Eye is forced to do detective work in order to find out how Winter Firefly gains sensitive information only the Inunari police would know about.