The heroine is not an innocent fool. She was a chess piece placed by the boss's stepmother. At the wedding, the boss got key evidence and decisively escaped from the marriage, just to force the stepmother to reveal her trump card. The heroine failed in her mission, was expelled from her family, and was reduced to making a living by playing black boxing. Three years later, Boss Ba returned to China with her prostitution contract and forced her to become his "personal bodyguard" and "living chess player", intending to train her into the strongest secret guard to deal with the killers sent by her stepmother. However, the heroine's iron blood and wisdom gradually revealed in the life-and-death fights, as well as her obedience and non-resistance to her "chess piece" status, instead made the boss develop a pathological possessiveness.
