Bai Lu is a police officer still devastated from the failure of an undercover operation. In the process of solving a case she meets the neurotic and talented forensic doctor Gu Yu. These two women with different personalities become deeply entangled in each others' lives, and are bonded by a common goal of investigating and finding the truth. They, along with An Huai Yu, lead a team of young officers to unveil evil and maintain the dignity and integrity of their professions.