An Xin (played by Zhang Yi), a front-line criminal police officer in Jinghai City, is constantly in a struggle with the black and evil forces, and is never able to bring the criminals to justice. After the national political and legal team education and rectification work, Linjiang Province sent a steering group to Jinghai, combined with the public prosecution, law and justice departments, to clear the corrupt elements within the political and legal team. This crushed the protectionistic measures the black and evil forces have planted in the system, and in one fell swoop, he managed to eradicate the strong group that has been cooped up in Jinghai for many years.