Lin Xiaoyu, an orphan who has been alone since she was a child. Because she has never received care, she has become very withdrawn and introverted. Until he, Han Yingwei, appeared, he cared for her as if he were his own sister. From then on, Lin Xiaoyu regarded this brother as the only sustenance in her heart, and later fell madly in love with her brother Han Yingwei. For the happy life of his beloved sister, he risked everything and finally embarked on a road of no return.