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.

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.

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

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

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.

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.