My father-in-law knows martial arts

Ma Yuru (played by Song Dandan) is a police station director. Finally, she ushered in the day of retirement and returned to her family to start her old life. However, she found that the trivial matters in life are far more complicated and difficult to solve than the accident disputes in the station. Ma Yuru has a son and a daughter, Ding Satisfied (played by Xiao Yang) and Ding Ruyi. Ding Yiyi has a failed marriage and now raises his son Ding Dang alone. One day, Ding Yiyi meets the gentle and virtuous Bai Yan (played by Jiang Yan), and the two gradually fall in love. But at this moment, his ex-father-in-law Cheng Daji (played by Ni Dahong) suddenly appears, making the future of Ding Yiyi and Bai Yan full of twists and turns. Not only that, Ding Ruyi also met and fell in love with a man named Cheng Gong, and this Cheng Gong turned out to be Cheng Daji's nephew. Just when Ma Yuru's family was in an uproar, Ding Yiyi's long-lost ex-wife Cheng Lu (played by He Miaomiao) was suddenly revealed to have died.