拉韫的亲生儿子阿察娇生惯养，霸道无理，阿伟的女儿平平在学校成绩功课突出，外貌也好看，阿察就这样瞧瞧喜欢上了她，他设计侮辱她并拍下视频，第二天还洋洋得意的拿着视频找到平平约她见面，为了怕事情败露，她也只好去了，之后阿察越来越嚣张，还把视频拿给她母亲看，平平母亲气急败坏和阿察扭打起来，平平在危机关头失手砸死了阿察，母女俩将阿察尸体掩埋，这一幕被小女儿安安亲眼目睹…阿伟到家后，母女将事情告知，几人合力将车子推入湖里，阿伟带着一家人外出玩耍，另一边拉韫发现儿子失踪，并找到了河里的汽车，有人告诉拉韫看到阿伟坐了她儿子的车 ，她把阿伟家人抓进去审问，由于没有证据便放出来。拉韫凭借自己的经验知晓杀人凶手，但苦于没有证据逮捕。某天阿伟看到小女儿安安偷偷改试卷分，他决定做一个好父亲，就亲自去警局投案自首

La Yun's biological son, Acha, is spoiled and spoiled, overbearing and unreasonable. Awei's daughter, Pingping, has outstanding grades in school and good looks. Acha is like this Seeing that he fell in love with her, he designed to insult her and took a video, and the next day he proudly took the video to find Pingping and asked her to meet, in order to avoid the incident, she had no choice but to go, after that, Ah Cha became more and more arrogant , and showed the video to her mother. Pingping's mother was furious and wrestled with Acha. At the critical moment, Pingping missed and killed Acha. The mother and daughter buried Acha's body. This scene was witnessed by the youngest daughter An An... Awei After arriving home, the mother and daughter told the story, and together they pushed the car into the lake. Ah Wei took the family out to play. On the other hand, La Yun found his son missing and found the car in the river. Someone told La Yun that he saw Ah Wei took her son's car, and she took Ah Wei's family in for interrogation, and released them because there was no evidence. La Yun knew the murderer based on her own experience, but suffered from lack of evidence to arrest him. One day Ah Wei saw his youngest daughter An An secretly correcting the test paper. He decided to be a good father, so he went to the police station and surrendered himself..