Retired security expert Bai An held He Ting, a little girl from a wealthy family, hostage in order to avenge her father, but accidentally helped her escape the drug dealers' murder. Although young, He Ting is mature and alone in the face of her father's uncertain life and death, she proposed to cooperate with Bai An, her enemy who wanted to kill her father, and together they embarked on the journey to find her father.