The girl's father was extremely patriarchal. After his wife gave birth to twin sisters, he ordered the children to be locked up to fend for themselves. The mother tried her best to protect one (hereinafter referred to as "sister"), while the other (hereinafter referred to as "zero") was locked up in a small dark room alone. After that, his father imprisoned his mother and sister and forced his mother to give birth to a boy. The mother was also beaten by him every day.
More than a year later, the mother became pregnant again. The fortune teller said she was expecting a boy, and the father's attitude improved slightly. The mother took the opportunity to take her sister out for some fresh air, but in fact she planned to use her own death to draw attention to the family from the outside world and help her sister escape. She told her sister to die on the rooftop. The male protagonist's father took over the case as a policeman, but because of his strong family background, the case was dismissed and his sister was captured and continued to be imprisoned.
Ling was imprisoned in a small dark room and escaped with his own intelligence. During the escape, he met the male protagonist who was arresting a drug dealer. After learning that he was a policeman, Ling took the initiative to expose his whereabouts and was willing to be captured and brought back to his father - she believed that only with the help of the police could she completely bring down her father. For many years afterward, Zero secretly collected evidence of his father's corruption while in captivity. At the same time, the father of the male protagonist spent 8 years investigating the case, risking his life to find key loopholes, and entrusted the clues to the 20-year-old male protagonist before his death.
