"Recommended index:? Main plot: Twenty-five years ago, Shen Dan's father had an important project to complete in Beijing, and his family moved to Beijing from the northeast. Shen Dan entered a key high school in Beijing. There is a small group of girls in the class, headed by Timi Zhuo. Their slogan is: the red flag does not fall, and sisters do not leave. Shen Dan quickly adapted to the new school life of this small group. On a special day, she officially became a member of a small group. Twenty-five years later, the two sisters have long lost contact. Shen Dan married a Beijinger and became a housewife. One day, Shen Dan went to the hospital to visit her sick mother and accidentally saw the name "Timi Zhuo" in the intensive care unit. The two sisters reunited after 25 years respectively. Zhuo Ke Yiting's time is running out. She hopes to see her sisters get together before she dies. With the efforts of Shen Dan, the remaining sisters were found back one by one. At Timi Zhuo's funeral, all the sisters, without exception, gathered together to fulfill their vows.