Tears (Norika Fujiwara), pupil (Izumi Inamori) and Love in the afterlife (Yuki Ueda) are three sisters of Brotherhood. On the surface, three kind and strong girls run a cafe called Cat's Eye, and when night falls, they will transform into omnipotent art thieves, unwitting income from all their targets. It turned out that the father of the three sisters was a well-known art collector, but one day, he disappeared mysteriously for no reason, and the famous paintings and jewelry that should belong to the three sisters were found in various gallery and museums. In order to take back these things that should have belonged to him, and to investigate the truth of his father's disappearance, three beautiful shadows were hidden behind the night. The behavior of the cat's eye robber naturally attracted the attention of the police department, and it was the criminal police boyfriend of Xiaoqiu who was responsible for investigating the case.