Mom's son is a Korean movie.

Korean film in 2009, directed by Bong Joon ho, starring Jin Huizi, Won Bin, Qin Jiu and Jae-mun Yun. Mother describes a great mother and selfless maternal love. She fights alone to help her son get rid of murder charges.

My widowed mother has been living with her only son for many years, and his son is a gentle and quiet person. One day, a serious murder happened in the city. Poor son doesn't know why he became the prime suspect. In fact, the police have no evidence, but they jump to the conclusion that their son is a murderer. On the other hand, the son has no evidence to prove his innocence. The police who were eager to close the case didn't think there was anything wrong with such a hasty investigation and quickly arrested their son. The defense lawyer is incompetent and unreliable, and it seems that her son is doomed to conviction. Having no choice, the mother was forced to investigate by herself to prove her son's innocence. But as the mother investigated the case step by step, she found that her son was the murderer. The mother killed an old scavenger as a witness to protect her son. Finally, his son was released, and his son was replaced by another mentally retarded young man without a mother. Mother's heart was greatly tortured, so she had to use acupuncture to dilute the painful memories.