Five years ago, Sasaki Rena's younger sister Sasaki Sakura was brutally murdered. Before Sasaki Sakura was killed, she secretly moved to a relative’s house to avoid a stalker, but the murderer learned of Sasaki Sakura’s residence through detective investigation, and thus had the opportunity to carry out this cruel murder. . In order to find out the detective who helped the evil and avenge her sister, Sazaki Rena joined the detective agency and became the only detective in the Anti-Detective Division. After two years of hard study and training, Linnai was ordered to investigate those detectives who had no morals
When she was ordered to investigate a certain case, Linnai accidentally met detective Abilius, and found that the death of this man and her sister seemed to be the same. There are countless connections. At the same time, Abilius entered the police station, trying everything possible to gain the trust of the police. Linnai felt that this matter was not simple, and she firmly believed that there must be many unexpected secrets hidden in Abilius.