Liu Yanfeng, the top killer of "Shadow", has blood on his hands. He is a lone wolf who is frightened by the underworld. His world only has tasks, rules and death, and there is no warmth to be found.
Zhang Dan, the daughter of the Zhang Group, is a bright and clean white moonlight in the medical school. She lives a pure life and knows nothing about darkness. However, because her family offended the transnational criminal group "Black Scorpion", she became the target of being hunted down.
A huge commission made Liu Yanfeng Zhang Dan's exclusive guardian. The knife-edge rescue in the alley on a rainy night broke the barrier between the two worlds. He was as cold as iron, but in her clean eyes, she could see the long-lost light; she was timid and weak, but under his silent protection, she could read the hidden tenderness.
Danger ensues. The crazy revenge of the "Black Scorpion", the ruthless pursuit of the "Shadow" organization, and the numerous obstacles to forbidden love push the two into a desperate situation. For her, he shed all his anger and was willing to be the enemy of the whole world; she broke through the shackles of the world for him, and was willing to accompany him through all the swords and shadows.
When the cold gun is pointed at the loved one, when the organization's rules crush the sincerity, can the killer and his white moonlight burn out their deep love in the dark realm and find a way to the rest of their lives?
This is a life-focused protection, a passionate love that spans light and darkness. In the light of swords and shadows, it witnesses the most taboo and steadfast love.
