I marziani hanno 12 mani

There are other more or less intelligent forms of life in the universe. Four aliens, X1, X2, X3 and X4, land in Rome aboard a flying saucer. They are the emissaries of the people of Mars, who, in charge of preparing plans for the invasion, must present to humanity an ultimatum: to persuade public opinion and politicians that it is better to fraternize instead of fighting. However, our four Martians not knowing very well Humans are inexorably conquered by their casual, lazy, idealistic and seductive behavior while trying to imitate them...