Xu Nuo, Ji Zhishan, Lin Musen, and Tang Zihan, four young people who work hard in the city, stage ups and downs stories at different stages of life, career and emotional encounters. From entering the workplace to entrepreneurial adventures, from family disputes to emotional dislocation, from friendship bonds to self-salvation. Multiple threads progress together and are interrelated. In the end, they grow through setbacks and struggles, examine themselves, and finally reap the transformation of friendship, love and career. The book is humorous and compact in style, full of realistic irony and warm healing, allowing urbanites to see their own reflection.