Chu Ruanruan, a wild girl who has no father or mother in the countryside, relies on the big black dog in the village to make ends meet. When she was 5 years old, a beautiful brother came from the city to help build cement roads in the village. The beautiful brother was named Ning Xuan. He had been frail and sick since he was a child, but he never expected that when he was close to Chu Ruanruan, he felt as if he had inhaled the spirit of immortality. The Ning family brought her back to the city and loved her like their own child. Chu Ruanruan's life took a turn since then.