In Lausanne, Léon is involved by accident with a small Leninist group and gets to know Léa, a dedicated activist and the group leader's mistress. The police keep a close watch on them and trouble is bound to follow.

Five active members of the Lausanne Leninist Organization are actively involved in strikes, demonstrations, neighborhood actions and press sales. For his part, Léon, unemployed, libertarian and provocative, is dragging along his ironic rage. He got to know the group, particularly Léa, whom he saw often, but remained impervious to militant ideology. Nevertheless, he gave up his job as a canvasser-and bought a printing machine which he donated to the Leninist Organization. He now occasionally attends meetings, but always prefers Lea's company alone. Following a collective theoretical reflection on revolutionary violence, Léon robs a gun store and brings back nine large calibers to the Leninist group. The police arrested him and imprisoned him. On his release, still under surveillance, he returns home. Léa wants to see him again, or perhaps he wants to see her.—L. Valente