The islanders discover there is a traitor among them who has been feeding information to the armed activists.

Five passengers from a shuttle manage to avoid capture and hide, becoming the island's only hope for resistance.

This refers to of the French thriller mini-series L'île prisonnière (Prison Island), created by novelist Michel Bussi .

In this episode, tension on the fictional Breton island of reaches a breaking point as the residents and captors collide.