Hitomi Kisugi, along with her older sister Rui and her younger sister Ai, run a café called "Cat's Eye" in Tokyo. The sisters lead a double life as a trio of highly skilled art thieves, stealing works of art which primarily belonged to their long-missing father, Michael Heinz, who was a famous art collector during the Nazi regime. Hitomi's fiancé is Toshio Utsumi, a clumsy young police officer who is investigating the Cat's Eye case. Despite being a frequent visitor to the café he is unaware of the double life of the girls. Hitomi regularly informs the police in advance about her next job using a signature "Cat's Eye" calling card, and then uses Toshio's research about the security surrounding the target to help plan the job.
