Her name is Xia Xi and his name is Xia Chen. He is the elder brother and she is the younger sister. They met on a rainy day when she was eleven years old. She has a docile personality and relies on him, while he has a cheerful personality and silently protects her. In the end, the relationship between them turns from a mutually dependent family relationship into an inseparable love. When she was twenty years old, she met Cheng Che, who completely changed their fate. He was the heir to the Cheng Group and Xia Chen's half-brother. He approached her to get revenge on Xia Chen, and finally fell in love with Xia Xi, who didn't love her. . . . . .