You Xia was adopted by the You family since she was a child. Mrs. You had a son at the time - You Yi. So You Xia called You Yi his brother. Because he was the only child in the family, he would often bully Youxia when he was young, but he never allowed others to bully poor Youxia. As the siblings grow up, their relationship becomes closer and You Xia becomes more and more dependent on You Yi. However, there is an uninvited guest at home - Gu Sizhe. Gu's father had an accident and entrusted the You family to take care of him. The three of them lived under the same roof. But soon, Youxia heard the bad news that Youyi was about to get engaged. She knew that she could not hope for anything, so she became depressed. Gu Sizhe loved and hated Youxia, who was deeply in love with Youyi, but could do nothing. He only walked to Youxia to comfort her when she was lonely. Just the night before the engagement, You Yi's engagement partner, Lou Shang, fell down the stairs. Almost everyone thought it was You Xia who did it...