A factory surrounded by skyscrapers is home to a group of part-time workers. Liang Dahua (played by Li Qinqin)'s husband was seriously injured for violating work regulations. Liang Dahua sold his hometown house, desperately earned money to pay off his debts, and kept shuttling between buildings and mansions, in order to save the life of his rich wife Bai Meiyan (played by Zhou Xiaoli), Liang Dahua disregarded his previous suspicions, quit his old employer for many years, and became the nanny of Bai Meiyan, who was paralyzed in bed. Hong Yue'e (played by Liu Lili) in order to support the tuition of her youngest son Zhong Sen, who is studying in Beijing University, is greedy for money, and does not hesitate to turn herself and her eldest son Zhong Lin into a money-making machine. Before she died, she told her eldest son Zhong Lin that Zhong Sen was not her biological flesh and blood. The reason why she and Zhong Lin worked so hard to support Zhong Sen to study was just for a promise. And the young Zhou Wei, in order to take care of the little French girl Qiao Na (played by Bei Ailing), who lost her mother, endured the pain of eye disease, missed the best treatment period, and used the money from her part-time job to pay for Qiao Na's expensive medicine. ...