This is a story about three sisters in search of their lost father, who was a famous artist. They steal his works of art from museums/galleries to make him recognize their presence in the world. The three sisters' gang is called Cat's Eye, and so is the coffee shop they own. This coffee shop is located right in front of the police-headquarters. Hitomi, the middle sister, is betrothed to the police inspector Toshio, who is in charge of the investigating the Cat's Eye. Toshio falls in love with Hitomi, even as a Cat's Eye member.