After a terrible past Rei (Ray) Kasugano has dedicated herself to saving others lives for no money. She works as a doctor and due to special abilities she can see inside a person, making her very good at her job. As she works at the office, Shinoyama, a friend of and co-worker, works at home to create quick ways to save lives along with her. Ray, Shinoyama and her female co-workers face many obstacles to save these lives but work together to do it.