The story unfolds in Mazongshan Town, Subei County—Gansu Province's only border county—on this vast, rugged stretch of Gobi borderland. Mazongshan Town has earned honors including "National Advanced Grassroots Party Organization," "National Model Collective for Ethnic Unity and Progress," and one of the first "National Model Townships for Safe Borders." The drama begins with a real-name whistleblower tip: Chaogetu, a grassroots official who has guarded the border for more than twenty years, is falsely accused after a misunderstanding arising from competition between rival businesses. A handful of photos that appear to "prove the case" plunge him into a whirlwind of rumors about self-dealing and moral misconduct, subjecting him to immense public pressure and strain on his family.