Patience Portefeux is a French-Arabic police translator, specialized in phone tappings for the anti-narcotics unit. The job is tough and low-paid, but the commander is charming… One day, whilst listening…

May 1944, a group of French servicewomen and resistance fighters are enlisted into the British Special Operations Executive commando group under the command of Louise Desfontaines and her brother Pierre….

As the daring thief Arsène Lupin (Duris) ransacks the homes of wealthy Parisians, the police, with a secret weapon in their arsenal, attempt to ferret him out.