圣诞 5343 年，一艘坠毁的飞船发来了一封紧急求救的信息。博士赶到后，发现求救信息来自宋江，她要 Doctor 拯救她的丈夫 —— King Hydroflax 。被卷入这场宇宙阴谋的博士发现宋江竟然不认识他，而他极力避免的那一天终于不可挽回地到来了，宋江与博士会有一个 Happy Ending 吗？
12-year old dreamer Vlad likes telling fantastic stories about his courage to his summer camp friends, although he is a bit of a coward himself. But one day Vlad finds himself in a real adventure as he accidentally gets caught in a conflict between two alien forces. Shapeshifting Trashmen, descendants of an ancient alien civilization, try to disable electricity on the whole planet by deactivating the defensive shield that protects the Earth from an approaching solar wave. In this way they challenge the all-powerful and mysterious Energy that enabled humanity's technological progress and which we depend on more than ever. In this battle Vlad is helped by a transformer box called the Bobot, which holds the key to saving the world. While telling stories about fictional courage is easy, Vlad will find out that overcoming his fear in the real world is quite a challenge. Mankind's future lies solely in his hands.
故事围绕一个家庭展开，家庭的主角是一对母子，他们躲在地堡里幸存了下来变成了地球上最后的人类家庭，可是导致世界末日的缘由来源于他们二十年前的所作所为。
地球并不只是人类的天下，其实有1500名外星人生活中我们当中，而星际移民局则处理和外星人相关的事情。 纽约普通警察爱德华兹（威尔·史密斯 饰）因缘际会之下加入了这一组织，成为MIB的一员，代号J，从此没有名字、没有身份，成为特警K（汤姆·李·琼斯 饰）的搭档。 J应对的 第一起事件就是虫族的入侵。亚基伦王子罗斯伯在地球被虫族杀害，而他随身携带的“银河系”——宇宙次原子能源的最好来源也失踪了，若虫族找到，将给亚基伦人带来毁灭性的打击；亚基伦人发出最后通牒，如果地球人不能在一个小时之内交出“银河系”，他们就摧毁地球。 为了地球的安全，K和J不得不挺身而出。
