Lu Zhen, a 21st century criminal policeman, was shot during a fight with a drug dealer. He thought he was going to die but unexpectedly came to the Republic of China era. At this time, opium was rampant in the Republic of China and the Chinese people were weak and mentally weak. Lu Zhen was determined to promote Chinese martial arts and strengthen the Chinese people's body. He traveled all over the country, fighting against invincible opponents along the way, but in the end he found that no matter how hard he tried, he could never change many things...