Sentenced to life imprisonment for illegal activities, Italian International member Giulio Manieri holds on to his political ideals while struggling against madness in the loneliness of his prison cell.
An island has been decimated by a volcanic eruption and the few survivors escape to a nearby island. Led by Rutolo, they know that their new home is equally susceptible to such a catastrophe via its own volcano, but they are unable to convince the current inhabitants of Island #2 to flee with them to a mainland.
Political activist Salvatore returns to his native Sicily and stirs up trouble among the peasants, urging them to confront the Mafia and demand the right to plough their own fields. The peasants refuse to help him, and Salvatore is marked by the Mafia as a troublemaker.
