At the commendation meeting of Dongchuan Province's "Top Ten Rule of Law Figures", He Shuguo, the director of the Second Procuratorate of the Provincial Procuratorate, was suddenly attacked by the family members of the local "September 30 Murder Case" death row inmates. In order to find out the truth, Zhang Youcheng, secretary of the Provincial Political and Legal Committee, appointed prosecutor Feng Sen as the leader of the provincial circuit procuratorate to investigate the case in depth. After Feng Sen took office, his different case handling style caused controversy. In the process of restarting the investigation of the "September 30 Case", the layers of fog were gradually revealed. Feng Sen and Luo Xinran, director of the resident procuratorate, faced the truth, feared no threats, adhered to their professional ethics, and made a new interpretation of the law of prosecutors in the new era to uphold people's justice, and upheld the sanctity and authority of the law.