Amid the everyday bustle of an ordinary residential community lies the gentlest kind of mutual devotion. Gu Yu, a security guard, diligently stands his post day after day, protecting the lights and homes of the entire community while quietly waiting for Su Nianzhi, the female lead, to return home each time. Once living alone, Su Nianzhi led a bland, uneventful life until Gu Yu entered her world with his long-standing, unwavering companionship. There are no grand, breathtaking romantic gestures, only the gentle companionship of the evening breeze, day after day. Through the passing years, he safeguards the peace of everyday life, and she embraces the promise of tenderness. Together, they weave a healing love story in which the evening breeze understands the heart and each day and night brings peace.