在城市外围的荒野上，住着一户生活在房车内的人家。男主人佩德雷（Emilio Gavira 饰）是前马戏团的侏儒表演者，内向的儿子西卓（Aníbal Tártalo 饰）喜爱天文，内心却以侏儒的父亲为耻，经常躲在马戏团废弃的炮筒里，或者沉浸于对太空世界的幻想之中。
放学时刻，西卓怕同伴们嘲笑，躲在厕所里最后一个离开学校。他的心事为佩德雷探知，佩德罗将其关在房中，不准吃晚饭，西卓溜出房间，再次躲在炮筒里。佩德雷走进儿子的房间，若有所悟，第二天他抬出废弃的大炮，手指向天空。夜晚，随着一声炮响，佩德雷消失在茫茫夜空之中……

In the Headquarters of the T.I.A. (Terminal Intelligence Agency), someone has stolen Professor Bacterio's most dangerous invention, the D.O.T. (Demoralizer of Troops), an artifact that ends up in the hands of a very short, wacky dictator who is ready to use it for criminal purposes. The T.I.A Chief, though, is firm in his resolve: if he wants to get the D.O.T. back, he must NOT count on his agents Mortadelo & Filemon. But when the crime fighting duo discover that the T.I.A. has engaged a cocky and slimy detective from outside the agency, they decide to act at their own risk, even if that risk involves all of Humanity.