A righteous soul travels back to 1933, the 22nd year of the Republic of China. At that time, the Japanese were already preparing to invade China. Lu Yang, a student from China studying abroad, is recruited into their spy organization. He is conveniently used by the time traveler, beginning a thrilling journey of espionage. He starts as a low-level policeman in the Nationalist government, and is subsequently recruited by the Central Bureau of Investigation and Statistics (Zhongtong) and the Military Bureau of Investigation and Statistics (Juntong). Later, he rises to the rank of lieutenant general and section chief. During this time, he uses his identity as a cover and various connections to continuously elevate his status, gaining access to more crucial secrets. He silently contributes to the great liberation of his motherland. The protagonist is decisive and ruthless, showing no mercy to the enemy.