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.

Bud Spencer
as Sheriff Hall

Raimund Harmstorf
as Captain Briggs

Cary Guffey
as H7-25

Joe Bugner
as Brennan

Carlo Reali
as Turner

Luigi Bonos
as Allen

Harold E. Finch
as Air Force General

Dino Emanuelli
as

Giancarlo Bastianoni
as Soldier

Giovanni Cianfriglia
as Soldier