Sanbao (Duan Bowen) is an ordinary young man wandering in Beijing. After his girlfriend betrayed him, he suddenly lost the meaning of life. Then he lost his job and was kicked out by the landlord. He even thought of committing suicide. Fortunately, Sanbao has a good buddy Wang Ming (Lv Yulai) who always supports him. Because of an accident, they met the lead singer of the bar band Youzi (Li Xinyun) and the dancer Xiaoshi (Shi Shi) dressed as a woman. As outsiders in this city, the four young people are out of tune with each other. They live in the cracks of the city, have their own troubles and difficulties, and are always in a state of frustration. They have suffered betrayal, endured humiliation, and witnessed the people around them come and go. Life is not kind, but spirit is kind. The four young people support each other and take care of each other. They did not give up the pursuit of beauty because of the mockery of fate. In places without light, they use darkness as a lamp.