In the course of a violent hold-up at Deauville station, several innocent bystanders are shot dead. The victims include a politician, Robert Andréani, and three members of the same family. Devastated by the death of his wife, daughter and mother, Martin Modot resolves that their killers will be brought to justice. When the police fail to make any progress in their investigation, he decides to take matters into his own hands, with the support of a neo-fascist vigilante organization.
Martin Modot
Lucie Kasler
Eddy Kasler
Divisional Commissioner Henri Brousse
Nadine
Philippe Miller
Varin
Lucien Modot
Self
Jockey
Inspector Paul Gouvion
Christine Modot
Robert Andreatti
Mrs. Modot
Inspector Carducci
Le Gay
'Mata-Hari'
Bartender (uncredited)