The male lead was abandoned by his parents as a child and raised by his adoptive parents. His adoptive father treated him fairly well, but his adoptive mother constantly abused him and refused to let him attend school, making him work to pay for her son's education and expenses. Her son was younger than the male lead and spoiled rotten. He refused to behave, and whenever he got into trouble, he blamed the male lead, who was always wrongly accused. At sixteen, the male lead dropped out and apprenticed himself to a mechanic recommended by his adoptive father. Over time, the mechanic came to accept him and took him on as a disciple. During this period, he fell in love with his master's daughter. Then, one day, the entire family was murdered, and the master's daughter was raped and killed. The male lead was framed for the crime and, despite insufficient evidence, sentenced to twenty years in prison. He behaved well behind bars and made a group of friends among his fellow inmates. After being released early, he set out to uncover the truth, find the person who murdered his master's family, and clear his name. Many strange things happened along the way. After countless dangers, he finally discovered that the killer was actually...