Substitute Falls in Love with Employer

Chu Xi, a cold killer who grew up in an orphanage, was recruited by Master Xiao into the top assassin organization "Rose" at the age of thirteen. She and her warm-hearted partner Gu Changan lived and died together on the tip of a knife. The two, who had long been tired of their bloodthirsty life, agreed to quit completely after completing the last mission. The target is Cheng Yi, the legend of the underworld and the crown prince of the Cheng family in the capital - this semi-retired boss who owns the shadow organization and has the world's top wealth. The only obsession in his heart is Su Li, the queen of the White Moon Light and Shadow who became disabled in both legs because of saving him and went to Country M for treatment. Chu Xi transforms into Su Li's substitute and sneaks into Cheng Yi's side to steal secret files. However, in the disguise of every step, she is coerced by Cheng Yi's hidden tenderness and paranoia, and her cold defense gradually collapses. When the stand-in's lies, the killer's mission and uncontrollable emotions collide fiercely, she must maintain her withdrawal agreement with Gu Chang'an, while facing Cheng Yi's passionate but mixed feelings with "Su Li's shadow". This entanglement that starts with deception will eventually push everyone to the crossroads of destiny.