The presence of mafia boss Vangelli's yacht in front of the island of Ventotene brings a group of prisoners of the penitentiary close.
Philippe Leroy
Dagmar Lassander
Raymond Pellegrin
Franco Citti
Maurizio Arena
Augusto Martelli
Enzo Robutti
Armando Tortorici
Luciano Pigozzi
Ernesto Colli
Rosaura Marchi