For twenty years, repairman Gu Changhe has devoted himself to caring for his stepchildren. But during a dispute over a house for his retirement, one remark—"You're not our real dad"—breaks his heart. He leaves home to start his own business, remaining true to his craft and principles. During an old-neighborhood redevelopment project, he refuses favoritism and falsification, building his reputation on honesty. Amid tangled interests, he consistently puts rules and responsibility first, ultimately earning respect and genuine affection.