阿李（刘青云 饰）是一位神父，一生兢兢业业传道授业，向世人宣讲神的伟大和光辉。然而，一场意外之中，阿李竟然沦为了强奸犯，被推上了被告人的席位，接受法律的审判。阿李的特殊身份令此案充满了猎奇的意味，人人都认为阿李必定获得有罪判决，然而只有阿李的心中明白，自己从未背叛过信仰。 乔红（李若彤 饰）是一位恪尽职守的律师，这也就意味着，在她的眼中，善恶输赢皆是手中翻覆的玩物，唯有利益才是永恒不变的真理。阿金（曾志伟 饰）身为双手沾满了鲜血的黑帮头目，却是阿李门下最虔诚的信徒，神宽恕他的罪孽，却不能阻止他继续作恶。他们是唯二站在阿李身边支持他的人，在他们的帮助下，阿李能否洗刷罪名，重获清白呢？

Father Lee (Sean Lau) is young and unconventional. He fell into temptation and was sued by Donna (Almen Wong), who accuses him of rape. Lee faces a lawsuit and abandonment by his church and his followers. Gangster Mr. Gum (Eric Tsang) is willing to help and has hired Ku (Carman Lee) as his defending lawyer. Mr. Gum believes in silence by violence, while Ku would rather try false witnesses. But Lee refuses to attack Donna in court for fear of hurting her again. In the end, Lee proved to Mr. Gum and Ku that conscience does in fact exist in this corrupt world ruled by power and material desire.