Detective Akira Shinkai had a successful police career until a case got her demoted. She is now assigned to the verification investigation section. The purpose of the division is to verify each case and make sure nobody is falsely accused of a crime. Akira begins her new assignment verifying cases. If she discovers a small amount of doubt in the police report, she overturns the case and pursues the real criminals. All while having conflicts with the police detectives who are in charge of each case.