The graduation ceremony bells and the wind chimes in the teahouse played completely different melodies in Chen Mo's life. On one side is the sunny avenue with the police badge shining, and on the other side is the darkness sneaking away with nothing. He was originally a sharp knife in the police academy, but he took the initiative to erase his name from the world. For the sake of invisible justice and the peace of West Kowloon, he transformed into an island and sneaked into the heart of sin alone. During the years of being an undercover agent, there was no number, no backing, only Sir Liang as the only contact person and endless disguises. Caught between light and darkness, he gambled the rest of his life with forbearance and ruthlessness. Whatever cannot destroy me will make me strong. From Chen Mo to a nobody, he walked out of the ashes and walked a path of redemption belonging to a lonely brave man.