Paris nowadays... when two corpses are found in a car boot, for Sandra Longo it is clear that those homicides have been ordered by the boss of the local Chinese mafia.

When an important cache of seized heroin is stolen from a regional customs depot and two officers left dead, it becomes clear that there is a mole within the customs services. Commandant Sandra Longo, of internal affairs, is dispatched from Paris to unmask the traitor.