One is an undercover policeman, and the other is the core of a criminal group. They were originally opposed to each other in life and death, but in the midst of temptations, suspicions, and crises together, they were tightly bound by the silver bracelet of fate. They are each other's reflection in the darkness, the only ones who can see through each other's disguise; they struggle on the edge of the cliff of identity, compete between justice and revenge, and eventually become each other's only light.
When the police insider surfaces, when Master Long's butcher knife points directly at the two of them, and when the identity of the undercover is about to be exposed, can they cooperate inside and outside to destroy the Sihai Group? Can we protect each other and complete self-salvation in the choice between law and emotion? This encounter that started in darkness will eventually lead to the light on a different path.
