Kashiwagi Natsuko, who has stayed in the US for a long time, is a new investigator of Adjust Research, an insurance investigation firm. She possesses scientific genius and vast personal wealth, but has a tendency to feel out of place in Japanese society which is overly logical. On the other hand, Tono Aki is a veteran investigator in the same company. Born in the old part of Tokyo and a former delinquent, she is rather stingy because she lived in poverty when she was growing up. However, she has superb memory and animal instincts. Natsuko and Aki make an odd combination as they confront ingenious crimes associated with insurance money and expose the truth.

Kashiwagi Natsuko est une nouvelle enquêtrice pour le compte d'une assurance. Elle possède un génie scientifique et une grande logique et est fanatique de la propreté. Tono Aki est elle-aussi une enquêtrice dans la même entreprise. Ancienne délinquante et ayant vécue dans la misère, elle est devenue pingre. Possédant une excellente mémoire et un instinct animal lui permettant de ressentir les arnaques à l'assurance. Natsuko et Aki font une étrange combinaison mais très efficace contre les escrocs les plus retords.

모든 가치관이 정반대인 "요철 콤비"가 전문 지식과 경찰을 압도하는 정보 수집 등을 활용하여 보험 범죄를 조사하며 진실을 밝히는 이야기를 그리는 드라마