Senior high school student Saya Toma (Erika Toda) lost her parents and younger brother in a plane accident. Detective Akio Kondo (Yu Tokui) came and told her"the household has a high chance that they were murdered by people that have spec." This was the first time that she heard about"spec". 6 years later decides to be a priest. After receiving coaching by the FBI in the United 14, she returns. Saya Toma is delegated to work cases. Meanwhile, as a result of Satoshi Chii's (Yuu Shirota) plot, Juichi Ninomae (Ryunosuke Kamiki) believes Saya Toma his parents' enemy and attempts to push her into the edge. The plot of satoshi Chii also has caused Juichi Ninomae and Saya Toma to forget that they are sister and brother. The siblings are headed to your struggle. A girl named Maho Ueno (Umika Kawashima) becomes involved in their own fight. To safeguard Maho Ueno, Saya Toma uses"spec".