Beneath Nancheng's neon lights lie two different worlds: one gleams with the cold light of police badges, while the other burns with the dark flames of the underworld. She is Mo Wanling, the fiercest red rose in the criminal investigation division. Carrying a blood feud, she wields justice as her blade and vows to shatter the gloom of the underground world. He is Chen Kenian, known in the underworld as Brother Nian, the head of the Zhaoyan Group and the uncrowned king of Nancheng's criminal world. Though weathered by violence, he hides a tender heart, carving out a gray realm amid flashing blades and guarding a past and principles known to no one else.
A carefully planned undercover operation brings two people from opposite sides face to face. She approaches him with an ulterior motive, but through repeated clashes, acts of protection, and probing tests, she falls for the restraint and deep affection in his eyes. He sees through her disguise, yet willingly breaks his own rules for her, wagering the entire underworld to keep her safe. The gulf between their identities as cop and criminal, and the agonizing struggle between justice and love, are bound to make their devotion taboo.
