In order to find out the truth behind his mother's unexpected death, young prosecutor Shen Yan took to the front lines to handle the case. He and forensic doctor Gu Wanshu and other colleagues adhered to the belief that "evidence is king", spanning 22 years, and finally used the legal red seal to restore the historical past, demonstrating fairness and justice and the unyielding backbone of political and legal people from generation to generation.
