Miss Lian and Young Master Su have known each other through sex since childhood, but they have never met. Later, the eldest daughter of the Lian family, Lian Lingling, came to "work" in the company of the young master of the Su family, Su Yansheng. Therefore, they all knew that the other party was their online friend who they had been chatting with for more than ten years. But each of them has a hidden identity, a killer and an international police boss. The two met and fell in love. Is the killer turning good or the police turning evil?