麦克和乔希两兄弟到乡村度假,路上碰到当地村民的刁难,汽车抛锚,只好到小镇上去求助,不知什么原因,第二天醒来,镇上的人都不见了.麦克也失踪了,乔希到处去寻找,他不知道,因为化学污染,所有的人都被感染,一夜之间都变成了僵尸,乔希能否逃出这个活死的小镇吗?

Following the events of The Sheriff and the Satellite Kid, Sheriff Hall and H-725 (using the official identity of Charlie Warren) still get no rest from the military - because the little alien has not yet grasped the meaning of keeping a low profile. They are constantly on the move, and H-725's father has had to pick them out of a tight spot too many times already.

The town of Newnan are seeing little green men everywhere. The military have arrived and are on the lookout for UFOs. Everyone's high strung and Sheriff Hall (Bud Spencer) is left to deal with the aftermaths of the hysteria. On his way home from patrol he happens upon a little boy claiming to be an alien by the name of H7-25. At first the sheriff doesn't believe the boy, but with the mounting evidence, even he must eventually concede. Soon the military is after Sheriff Hall and H7-25, and it is up to the sheriff to keep the boy safe and beat up large swaths of soldiers so H7-25 can go home.