Chisato works at a detective agency by disguising her occupation to her husband. He went through rigorous training with the director every day, but the only request he ever received was to search for a pet. Still, Chisato prepares for a major incident, but a job to investigate a man's affair comes in. Chisato investigates the target's surroundings through pursuit, stakeout, and undercover investigation. She uses her attractive body to carry out her mission, but she has no way of knowing that this investigation will threaten Chisato's own life...