Retired special forces soldier Chen Hao returns home after ten years. Faced with his sister's serious illness and the passing of his parents, he chooses to shoulder the responsibility and not bow to fate. To raise surgery fees, he becomes the personal bodyguard of female CEO Gu Yao. No matter how many storms and hardships he encounters, he always keeps his promise and bravely takes responsibility, using action to protect his family and those around him. Gu Yao goes from misunderstanding to understanding, and from fighting side by side to falling in love, accompanying him through his most difficult days.