Xu Nian, who saw his mother die, became mute due to PTSD and lost his mother's love, and his father married his lover into the house and brought a stepdaughter of a similar age. However, Xu Nian has always thought that there is another secret to his mother's death, and in order to find out the truth, he can only pretend to be a weak and simple mute girl, but in fact he is a kind but high-IQ Black Lotus. The cold-faced boss Gu Weiyan is resolute and ruthless, and his childhood experiences make him suffer from paranoia of being killed, and he is full of defensiveness against people. Gu Weiyan has always suspected that the death of his father Gu Tao was a conspiracy between the Xu family and Gu Hongyu, and after learning Xu Nian's true identity, he wanted to use Xu Nian to find out the truth, so he signed a marriage contract with Xu Nian and lived together in a legitimate manner, but he didn't know that he was the prey of Xu Nian, a white and black hunter. The two of them have gone from acting each other to doing fake dramas on the emotional road.