本片根据三十年代的一宗真实事件改编而成。描述一名芝加哥的记者深入调查一宗冤案,他经过四处查访,后来得到有利证据,终于洗脱了一名男子谋杀警察的罪名。In 1932, a cop is killed and Frank Wiecek sentenced to life. Eleven years later, a newspaper ad by Frank's mother leads Chicago reporter P.J. McNeal to look into the case. For some time, McNeal continues to believe Frank guilty. But when he starts to change his mind, he meets increased resistance from authorities unwilling to be proved wrong.