Luo Mi and companion Rui Qi, staff members of a convenient service cabin, start by taking on a citizen assistance request that no one else is willing to take. Through searching, waiting, reviewing, environmental management and protection, and long-term patrols, they persist in "doing small things seriously," ultimately finding the citizen, solving the difficult problem, winning recognition, and promoting the environmental upgrade of the district, completing their growth from ordinary service providers to long-term guardians.