In the early 2020s, a realistic picture of urban villages and industrial zones intertwined in first-tier cities. The protagonist Lin Mo was born in a rural area. His father died young and he and his mother were dependent on each other. He dropped out of school at the age of 18 and went to work in the city. He worked as an assembly line quality inspector for three years and earned 3,000 yuan a month. He rented a leaky attic in an urban village with a yellowed "Change Your Destiny" poster on the wall.