The story takes place in Tokyo, in the beginning of the eighties. Michael Heinz, a German painter and art collector, disappeared many years ago, together with his art collection. Now, his three daughters, Ai, Hitomi, and Rui Kisugi are trying to find him. Hitomi and her sisters felt that they have to resort to theft if they want to see their father again. Acting under the name of "Cat's Eye" the three girls start their criminal career, supported by Mr Nagaishi.