Lin Feng and Lin Feng are siblings who were adopted by Jincheng Welfare Home when they were 7 and 4 years old respectively. An Jing spent four years, just as the orphanage was about to be closed and his younger brother was adopted. Ten years later, when the younger brother came back to look for his sister, he found that her sister was already dead. The younger brother vowed to avenge his sister and must know the truth of the matter. However, he had no power and no connections, so he had to change his gender and mix between two men. In the end, he got his revenge, but found that he was no longer himself.