James Keeney (Taron Egerton) was born in Chicago and is the son of a policeman. He was an excellent football player and was developing towards a professional path. The mistake he made made him sentenced to 10 years in prison without the opportunity of parole. The prosecutor gave him a chance to make up for his mistakes, but the risk was high. A man named Larry Hall (Paul Walter Hauser) kidnapped and murdered a 15-year-old girl, and this girl was just one of the 19 women he had killed in the past. Due to insufficient evidence, Hall may be released. Keeney's task is to make Hall admit his murder in prison.