As Stéphane and Mo secretly handle a diplomatic incident, a royal visit is announced. Lamine inspires housing reform ahead of a celebratory garden party.

With his father in hospital and Marion in Guadeloupe, Stéphane attempts to strike a deal with a demanding Queen of Norway, making Corinne very unhappy.

As Stéphane and the team land in Guadeloupe in search of Marion, they are greeted by angry citizens. Back in Paris, Andréï prepares a military operation.