The crisis aboard the plane threatens to leave the travelers stranded. Fearing for their lives, Sylvie and the others hatch a plan to flee the bunker.

As Thea and team attempt to lure Gia out of the vault, Ines searches for a way back into the bunker, and Rik confides in the ambassador.

At the bunker, the trial soon gives way to more twisted schemes. The group searching for seeds encounters a disoriented stranger.

After a distressing chain of events, Thea and Mathieu lead a search for a new plane, and the officers plot their revenge on Sylvie.

With the generator shut down, temperatures and tempers soar, sparking a tense standoff. The Colonel finds a damning piece of evidence at the air base.

Just as the passengers settle into the rhythms of life in the bunker, a sudden food shortage forces them to consider making another risky journey.