Bill Baker, an American oil-rig roughneck from Oklahoma, travels to Marseille to visit his estranged daughter, Allison, who is in prison for a murder she claims she did not commit. Confronted with language barriers, cultural differences, and a complicated legal system, Bill builds a new life for himself in France as he makes it his personal mission to exonerate his daughter.

Newly transferred to the bustling port city of Marseille to assist with a crackdown on organized crime, energetic young magistrate Pierre Michel is given a rapid-fire tutorial on the ins and outs of an out-of-control drug trade. Pierre's wildly ambitious mission is to take on the French Connection, a highly organized operation that controls the city's underground heroin economy and is overseen by the notorious —and reputedly untouchable— Gaetan Zampa. Fearless, determined and willing to go the distance, Pierre plunges into an underworld world of insane danger and ruthless criminals.

An ordinary morning for the Guarneri, a modest family of Sicilian origin. At breakfast, a bell rings. The police are here. And everything changes.