寻枪

马山（姜文）是西南地区某边陲小镇的一名普通警察，某晚参加妹妹婚宴时因喝得酩酊大醉被人送回家中，次日早晨醒来时，他发现从不离身的配枪不翼而飞。意识到偷枪人可用枪里的三颗子弹杀人时，马山不禁毛骨悚然，当晚所有参加妹妹婚礼的人都成了他的怀疑对象。 　　在对重点嫌疑人，卖“羊肉粉”的刘结巴、送他回家的周小刚、突然出现在周小刚家的旧恋人李小萌（宁静）一番追踪后，马山依旧没能理出任何头绪，而对李小萌的怀疑里，又混杂了极为复杂的感情，此又导致其妻怀疑他移情别恋。正在这时，李小萌在周小刚家被人用枪打死，马山作为嫌疑人被拘禁。经过一番冷静思考，他终于将乱麻捋顺，开始了寻枪之路。In a province in China, Detective Ma Shan wakes up on the day after the wedding party of his sister Ma Juan and finds that his gun with three bullets is missing. Ma Shan drank too much in the party and does not recall what might have happen with his weapon. He falls in disgrace with his superiors and investigates who might have stolen the gun. When his former sweetheart Li Xiaomeng is found dead with a shot of his weapon, he becomes the prime suspect. When the police force arrests his acquaintance Zhou Xiaogang, he discloses that Li Xiaomeng was accidentally killed since his friend was the real target of the murderer. Ma Shan uses Zhou Xiaogang as a bait to lure and arrest the criminal an retrieve his missing gun.