The story of "Changing Hearts" is about a pair of people who love each other. The heroine is Gong Yuan, the eldest daughter of the Gong family. She has congenital heart disease. When she learns about her condition and her time is running out, her only wish is to find her. When she was a child, she stayed at home with her parents. Later, Gong Yuan came to Yang Ji Noodle Shop and changed her name to Hua Xi. She met Yang Feng, the boy who gave her sunshine, and fell in love with this boy. Later, when Gong Yuan went to her grandfather's 60th birthday banquet, she met him. Because her cousin Su Xiaonuan was jealous of Gong Yuan, they had an argument in the car and got into a car accident. When her grandfather learned that the two of them could undergo heart transplant surgery, he chose his own granddaughter and secretly arranged a heart transplant for them. He used a magic technique to switch their hearts. After they woke up, they could not remember anything that happened before. It was as if they had changed their hearts and exchanged souls with each other. Their temperaments changed drastically. Between Gong Ai and Su Xiaonuan, who would Yang Feng choose to love in the end?