Xiangjiang of China in a parallel world, an international city where prosperity and evil coexist.
West Kowloon Police Station is one of the busiest and most dangerous divisions in Hong Kong. Here, sin never sleeps and justice never fails.
Chen Zihao, 22 years old, graduated first from the police academy and was assigned to the Crime Unit of the West Kowloon Police Station. Everyone thought this fledgling young man was just here to get gold - until he took over his first case.
No one knows that Chen Zihao has an innate talent: he can see details that others ignore, and can piece together the complete truth from the most inconspicuous clues.
From the "Rainy Night Butcher" serial murder case that shocked the whole of Hong Kong, to the "underground bank money laundering shady case" that shocked the world; from the undercover operations of cross-border drug trafficking groups, to the restart of cold cases that had been dormant for 20 years... It took Chen Zihao one year to grow from an ordinary police officer to the youngest "case-solving machine" in West Kowloon.
But the darkness in Xiangjiang is far deeper than he imagined. Behind every truth, there is a greater conspiracy; the end of every case points to a direction he has never thought of.
This year, he solved 17 major cases and arrested 42 criminals. He was known as the "Hong Kong Detective".
But no one knew that his real battle had just begun.
