Huang Yaohe, a middle-aged excrement worker, has been surrounded by filth all year round. He is obsessed with special smells. He has low self-esteem but prefers writing. He met young netizens on the Internet. In his later years, he was forced to move into a building and could not let go of his half-life habits and obsessions. An impulse to expose his career, break the illusion of respectability, and accidentally stumble upon the shady story of a netizen's mother illegally refining gutter oil. The dignity, obsession and humanity of the low-level people are intertwined with each other, and the reality is filled with absurdity and bitterness.