A new division was created in the police department: A “Special Investigations Unit” designed to look into unsolved cases. One needs a strong will to never give up and a sharp eye that can calmly look at the entire situation to tackle these unsolved cases. Izumi hasn’t had much experience as a detective, but she understands people’s pain better than anyone and can get a sense of how other people feel. Although the investigation team members all have different values and methods which constantly cause conflicts, they keep struggling hard against the time limit, before the statute of limitations runs out.