The protagonist, Chen Xiaomo, is a delivery boy who travels through the corners of the city. He is familiar with the fireworks and secrets of every street. When he encounters a bizarre case while delivering food, he accidentally breaks the situation with the delivery boy's "lower-level perspective" and is involved in a series of "city affairs". In the vortex of "well mystery + urban adventure", they deliver food and investigate the case at the same time. Their partner is Lin Xiaoxia, a newly recruited policewoman with an out-of-the-box personality. The two of them interact with each other in a funny way, solve bizarre mysteries in the down-to-earth urban life, and achieve a grassroots counterattack.
