At the age of 16 Zhou Lian, who lost her parents at the age of two and was raised by a stepmother, marries Jiang Mei, a progressive young man from Changsha No. 1 Normal School. Jiang Meiqing has also lost both of his parents. The couple has two sons, Liqun, Xiaoqing and daughter Xiaolian. The film follows the family through turbulent times from 1924 to 1930.
A young girl gymnast is killed in a car accident and a government driver confesses his drunk-driving to the police. But a chief justice finds out that the real culprit is the son of a high-rank official.
The Public Security Bureau intercept a telegram notifying foreign agents to retrieve the "110 secret". Shi Yan, head of the Reconnaissance Section, starts a campaign of counter-espionage, but one of his agents is soon killed on board a train.
