As every year, chief inspector Paul Bellamy spends a few days with his wife Françoise in the family house in Nîmes. Jacques, Paul's stepbrother, turns up unawares, which is bad news since the fellow is an alcoholic good for nothing. Also annoying is this stranger at bay who asks Bellamy for protection. Farewell peaceful holiday!

A hot young Wall Street trader finds a formula based on climatology to play the market and win big... but at what cost?

In France, terrorist groups and intelligence agencies battle in a merciless war everyday, in the name of radically opposed ideologies. Yet, terrorist and secret agents lead almost the same lives. Condemned to secrecy, these masters of manipulation follow the same methods. Alex and Al Barad are two of them. The former is the head of the D.G.S.E.'s (Direction Générale de la Sécurité Extérieure, the French equivalent of the CIA or the MI6) counter-terrorism unit while the latter reigns over a terrorist network, and both fight using the most ruthless of weapons: human beings. Secret Défense (aka Secrets Of State) tells of their secret war through the destinies of Diane, a student recruited by the French secret service, and Pierre, a troubled young man who thinks terrorism will bring him salvation. Trained and indoctrinated for missions which are beyond them, they are both drawn into a chain of events from which they seem incapable of escaping...