Deputy Geronimo (Joe Don Baker) is a tough (though also rather large) Texan lawman. His friend is gunned down by Mafiosi Palermo (Venantino Venantini), but Geronimo arrests him. Palermo is to be extradited back to Italy, Geronimo is sent to accompany him. However, mysterious engine trouble means the plane lands in Malta instead. Palermo is soon rescued by his henchmen.
Geronimo seeks to recapture Palermo with the help of a young policewoman (Patrizia Pellagrino), much to the annoyance of the local police (Lino Grech), and the Mafia. Geronimo gets into many scrapes, and a number of gunfights. He also gets into a rather bizarre bar fight where he fights people with rather terrible props. It ends up in a dogged battle to the death with Palermo... eventually.
This isn't a good film by any measure though is bizarre and silly enough to be very watchable. Geronimo, with his stetson, cowhide jacket and great size stands out a mile in every Maltese scene.