In order to raise tens of millions of dollars for her brother's operation, Ruan Zhixi signed a sky-high contract and became another person - Bai Yueguang, whom Fu Yun, the most powerful man in Beicheng, could not forget. She imitated the woman's voice and smile, learned her dressing sense, and acted as an affectionate shadow, just in exchange for her brother's life-saving money. Fu Yunshen gave her endless glory, but he also gave her biting coldness. He would call her "Ayu" gently, but when she was emotional, he would remind her with the cruelest words: "You will always be just a substitute." Ruan Zhixi hid all her heartbeats and warned herself that this was just a transaction. When the money and goods were gone, she left. But when she finally saved enough money and was about to leave in style, the superior man pushed her against the corner with red eyes and said in a hoarse voice: "Ruan Zhixi, who allowed you to leave?" Later she found out that someone had faked the affectionate performance and was deeply involved in it. But she also understood that when the truth was revealed, the substitute was the original sin, and her sin was unpardonable.