Reiko Akigawa, married for three years to her husband, a bank employee, lives a seemingly ordinary married life, but she also has a secret life as a national secret investigator. One day, while her husband is away on a long business trip, Reiko returns home after her usual shopping, and senses someone's presence. Reiko's eyes turn into those of a hunter catching prey. The intruder is a woman, and her name is Maya. She seems to be a half-baked investigator sent by an organization. Maya's training begins that day, but...