When the residents of Penhic are taken hostage, their only hope is the five passengers on the shuttle between the island and mainland who managed to escape. The invaders’ search to find them begins.

The postman arrives on Penhic from the mainland as he does every week. Will anyone, locals or the shuttle escapees, be able to warn him that the islanders are in danger?

Suspicions have been raging since the discovery of a traitor amongst the hostages who passed information to the group of activists. But hopes are raised by the sudden arrival of a police shuttle.

Will Yannick be able to escape the activists? Will he be reunited with Alex, who nobody seems happy to see again? Will they manage to free the islanders? Meanwhile, the start of operation Ocean Storm is looming.

The prisoners find out who betrayed them. Hope of escaping from school rests with the last two escapees from the shuttle, a grandmother and a teen. They form a desperate plan--with fatal consequences.

All is lost. Every shuttle escapee is either dead or captured. Children and adults have been separated. The activists can now trigger operation Ocean Storm, the entire reason they took the island hostage.