On the day of his divorce, the male lead, a frontline deliveryman, is humiliated by his ex-wife because of his occupation and looked down upon by those around him, who mock him as a useless member of the lower class. With no special powers or hidden identity, he relies solely on years of hands-on industry experience to uncover a major corporation's hidden supply chain loophole from a single delivery slip. He gathers evidence step by step and dismantles the disorder, using his professional expertise to break down occupational prejudice, earn respect, and help the company rebuild fair industry rules.