Xu Jianbo (played by Zhang Jiayi) has a son, a daughter and an adopted son, namely Xu Shucheng (played by Zhang Luyi), Xu Shurong (played by Yongmei) and Lu Shubai (played by Wu Xiubo). Xu Shucheng went to study abroad and returned after 15 years. He reunited with Xu Shucheng in Peking. At the height of the New Culture Movement, the two passionate men also devoted themselves to this vigorous movement. Lu Shubai and Xu Shurong had been engaged a long time ago, and Xu Shurong also had a deep love for Lu Shubai. Unexpectedly, a woman named Niu Lan (played by Tao Hong) appeared beside Lu Shubai. Niu Lan had a lively and cheerful personality and open-minded and trendy ideas. In her, Lu Shubai discovered a new world. However, what Lu Shubai didn't know was that when he left his family and followed Niu Lan to Beijing, Xu Shurong was already pregnant with his flesh and blood.