Spoiled and willful heiress Yin En unexpectedly becomes bound to a “protection system.” The system warns her that she will eventually be killed by Gu Ye, the illegitimate son. In order to survive, she takes the initiative to approach him and tries to redeem him. Gu Ye, who appears obedient on the surface, is in fact a cold and ruthless villain. Yin En originally intends to control Gu Ye to complete her mission, but instead receives the one and only exclusive affection she has always longed for.