2012年，人类被不知名病毒感染，纽约成为一座空城。Robert Neville（Will Smith 饰）是为军方服务的科学家，也是对病毒有免疫力的幸存者。白天，他带着狗Sam在街道上寻找食物，用广播寻找幸存者，在实验室里研究治愈病毒的方法；晚上，他只能躲在屋子里，因为那些感染病毒而没有死亡的人们，成为了“夜魔”只能夜晚出来活动，丧失理智，会攻击所有的人。
某天，Sam也感染病毒死去，Robert Neville陷入了前所未有的孤独。当他准备和“夜魔”们同归于尽的时候，另外一个幸存者Anna(Alice Braga 饰)救了他。Anna相信山上的隔离区还有幸存者，但是固执的Robert Neville却坚持守在纽约。
又一个晚上，“夜魔”攻击Robert Neville的住所，此时他的研究已经获得成功，但是只有坚持到天亮，人类才能得以延存。
电影我是传奇[双结局版]介绍，500字
《我是传奇》是一部科幻末世题材的电影，它于2007年上映，由威尔·史密斯和爱丽丝·布拉加主演。该电影故事发生在一场叫做“黑暗时代”的世界大灾难之后，人们被一种名为“病鬼”的病毒所感染，只有一个人-主人公罗伯特幸存下来，并变成了具有特殊能力的个体。
电影开场的场景是在一个被荒废和废弃的纽约市中心，整个城市看起来像一个废墟，一片荒芜。在这片废墟中，罗伯特带着他的狗在寻找食物和水，并试图找到其他幸存者。片中通过罗伯特的回忆，以及他的同伴-一只狗的陪伴，让观众了解到了大灾难的过程，以及罗伯特如何成为幸存者。
在这个世界中，感染者会变成不死的病鬼，这些病鬼会尝试攻击、感染其他幸存者。罗伯特的一个愿望就是跑到华盛顿特区寻找其他幸存者，并找到一个解决病鬼的方法。
在他的旅途中，他遇到了一对中年夫妇和一个小女孩-安娜，三人和罗伯特一同前往华盛顿，他们一路上遭遇了各种危险和病鬼的困扰，在经历了一系列的冒险和奇遇之后，罗伯特最终到达了华盛顿特区，并与其他的幸存者会师，其中包括一个名叫乔安妮的女人。
There, they find that there is a colony of survivors led by a man named Anna's father, whom Anna recognizes from a picture she carries with her. The colony is protected by a high wall and has a secure water supply. Anna is reunited with her father, and Robert is informed that they are working on a cure for the virus, but they need him to travel back to New York to test their theory that the survivors are immune to the virus.
Robert agrees to go back, but he is attacked by a group of infected on his way there. He is rescued by a female survivor named Anna and her young son, Tommy. They learn that Robert has a natural immunity to the virus and that he may hold the key to finding a cure.
As they journey back to the colony in Washington D.C., they encounter many dangers along the way, including hordes of infected and a group of unpleasant survivors who try to take advantage of Anna and her son. Once they reach the colony, they find that it is a secure and thriving community led by Anna's father, and Robert is reunited with his wife, who he believed to have died in the early days of the infection.
However, their happiness is short-lived when the colony is attacked by a large horde of infected, and the survivors are forced to fight for their lives. Many of them are killed, including Anna's father. But in the end, Robert and the remaining survivors manage to defeat the infected and secure the colony's future.
电影《我是传奇》结局有两个版本，观众可以选择看哪一个。在一个结局中，罗伯特最终成为了一个病鬼，在另一个结局中，他和其他的幸存者一起生活在一个相对安全的社区，并努力去寻找解决大灾难中出现的问题的方法。
总的来说，《我是传奇》是一部非常有趣和刺激的电影，它充满了惊险与刺激的情节，同时也传递了一种关于生存意志和人性的信息，值得观看。