When Jin Zi (Li Yingai) was 20 years old, she was accused of "child abduction" and imprisoned, which made headlines. People were surprised at her beauty and her youth. In the 13 years of prison life, she was an absolute model in prison with an angelic appearance. Jin Zi did her best to help everyone around her, so her cellmates called her "kind Jin Zi". On the surface, Jin Zi seemed to be more honest and disciplined than anyone else, but the flame of revenge in her heart did not go out for a day. When Jin Zi was released from prison, she immediately launched a revenge plan - it had been secretly planned and prepared for 13 years, and her cellmates also helped her in different places. Jin Zi's enemy was Teacher Bai (Cui Minzhi), who put her in prison that year. What made them grudge 13 years ago? How will Jin Zi take revenge? Will it succeed?