In order to destroy cross-border criminal syndicates, anti-narcotics policeman Yu Nian disappeared and lurked in the abyss as an undercover agent, codenamed "Zang Feng".
In the past three years, he personally erased everything in the past. In front of him, he was a ruthless and inhumane leader's cronies, and behind him, he was a lone and brave policeman who walked alone on the edge of black and white, every step of the way. He hid his warning, hid his faith, hid all tenderness and care, but he couldn't hide his care for her.
Lin Jing is the city bureau's forensic doctor, and she is also the person he once loved openly.
She watched him "fall" with her own eyes, dissected the murders committed by his men with her own hands, and hated him for betraying his original intention and deviating from justice. However, she discovered in clues time and time again his silent protection, his hidden bottom line, and his fleeting tenderness in the middle of the night that only belonged to lingering thoughts.
He kept an oath that no one knew in the darkness,
She waits in the light for an elusive truth.
Until the moment of closing the net comes, his identity is on the verge of being exposed, and the gun is pointed at his beloved,
He finally tore off the layers of disguise and revealed the edge he had hidden for three years——
"My name is Yu Nian, I'm a police officer.
I sank into the darkness, not to join in the evil,
It is to take you and this city towards dawn. "
Purpose: Undercover police