Ling Lie, a female killer codenamed "Snow Owl", was trained by the mysterious organization "Cold Blade" since she was a child to be a ruthless weapon, and she never failed in her mission. During a well-planned siege, she was betrayed by the organization, and when she was seriously injured and on the verge of death, she was rescued by Shen Yan, a doctor who lived in seclusion in the mountains. In the process of healing in isolation from the world, Shen Yan's gentleness and purity were like a beam of light shining into her life soaked in darkness. When the killer's instinct and emerging love collide fiercely, she must choose between the bloody past and the possibility of the future. The pursuit of "Cold Blade" and the secret hidden behind Shen Yan also make this encounter the beginning of changing the fate of the two.
