[2] At the beginning of the eighties, Sirio, a young worker of the Terni steelworks with a past in student protesting, decides to abandon his job to join an extreme left-wing group.

Although he declares himself contrary to the armed struggle following the decision by some elements of the group to carry out terrorist actions, he is arrested upon being caught with his best friend Apache.

Although there is no real evidence of his guilt, Sirio is promised freedom only if he will talk about the organization and his companions.

He refuses, and is subsequently transferred to a maximum security prison where he meets some of his companions (including Apache) and the Professor, a far-left philosopher considered the main inspiration of the movement.

These events will lead Sirio to estrange himself more and more from reality, until he finally loses contact with the outside world.