A typical 1968 film, it is directed in an elliptical style by the author, who builds a political theorem on the link between violence and revolution.

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.

Hoping to shake up the complacent Italian Communist Party, a group of leftist radicals sends an incendiary letter to a major evening newspaper declaring their intention to volunteer to fight American troops in Vietnam as a political statement against the war.