A French observatory receives signals from space which shock the world.

Something is hunting the survivors.

Group of survivors hides in a hospital, but their enemy is close.

The survivors make some disarming discoveries not only about the aliens but also about themselves. Mokrani goes on the offensive, taking the fight to the aliens. Chloe's past catches up with her.

Cracks start to show as the survivors find different ways to cope. Jonathan's increasingly perturbed by Sacha's strange behavior.

The survivors seek solace while analyzing the enemy.

Some of the survivors realize they may have some kind of strange connection with the enemy.