"In the sequel to "Prison Story", senior prisoner Ah Zheng (played by Chow Yun-fat) had his sentence extended due to a disagreement with his former section chief (played by Zhang Yaoyang). During his sentence, his mother died of illness, and his son Liangzi was sent to an orphanage and even resented his father. Ah Zheng wholeheartedly wanted to apply to go out to visit his son, but he was "sorrowful" by the prison guard..."