Shinobu and Yuki are with the Police Department’s Mobile Investigation Unit. On the job, they’re rivals, but are romantic partners off-duty. They keep their real relationship secret from everyone since if word got out, they would be transferred immediately. One day, the discovery of a body leads the two investigators to encounter a mysterious, beautiful woman, Kara, on the scene. From that day forth, Kara shows interest in Yuki. She moves into the apartment building next to Yuki’s women’s form and begins spying on her. Kara’s true identity and the reason for her interest in Yuki are shrouded in mystery. This fast-moving crime suspense drama depicts the activities of two investigators who take on the challenge of contemporary crime and their showdown with a beautiful, enigmatic woman.