In Hong Kong in 1930, 19-year-old Ying Xiaohai was a hooligan with no knowledge or skills. One day, he encountered the guidance of an expert, corrected his evil ways, and embarked on a career as a police officer. Facing the chaotic social environment, Ying Xiaohai was loyal and courageous. He followed Inspector Lu to rise through the ranks, saved dangers many times, and became a senior police officer who accepted both black and white.
