Ma Hu (played by Liu Dan), who has worked in the Correctional Services Department for many years, moved back to live with his son after retirement. Because Ma Hu still governs his family and everyone with the rules of guarding prisoners, his youngest son Ma Zhuang (played by Lai Lok Yi) feels like being in prison when he returns home. Even his work in the law firm is often interfered by his father. The two quarrels between father and son are getting more and more frequent. The second brother Ma Qiang (played by Xu Rong) and his wife Lao Lichang (played by Lin Yiqi) who are caught in the middle not only often act as mediators, but also have to bear the burden of raising the two children left by their eldest brother. In addition, there is a thirteen-year-old aunt Ma Rou (played by Guo Shaoyun); three generations of the Ma family live together. Due to different circumstances, experiences and values, the originally warm small family is lurking with inexplicable grudges. What can really fill the gap in everyone's heart...