Sun Zhe (Zhang Duo), a professional IT man, and Chen Jingbo (Zhang Meng), a manager at an advertising company, are a couple with avant-garde ideas. They love the free and happy world of two people and secretly decide not to have children. For this, they get a lot of pressure from their parents and even lie that they can't have children to get away with it. Jingbo's cousin Feng Ying (Niu Li) and her husband Zhang Jiaping (Tong Ruixin), who is the boss of a company, are middle-aged, but they are eager for the arrival of new life, so they start a hard, heroic and sweaty plan to make a baby. Jingbo's brother Chen Jianya "QQ" (Lei Jiayin) is as avant-garde as his sister and brother-in-law. He enjoys the pleasure of wandering among the flowers. Hunting for beauty and going to bed are far more important than getting married and having children, but even if you are fully prepared, you can't avoid the fate of being infected. The arrival of a new life has brought unprecedented changes to the lives of Jingbo, QQ, Feng Ying and others...