Just as Joana tours Michele's new desert sanctuary, known as the Shell, a massive sandstorm moves in and wreaks havoc.

While the residents of the Shell prepare for the next stage of the Selection, Joana summons allies from the Cause and reveals her master plan.

Forced to stand in for Michele on the next test, Elisa finds herself longing for the Offshore. Artur struggles to hide his condition from Rafael.

With supplies dwindling, Michele hurries to cut the Shell's remaining population in half. In flashbacks, the Founding Couple face an agonizing dilemma.

Glória whips up support for her campaign, leading to chaos at the Shell. Marco resorts to desperate measures when he runs out of food for his son.

With the Offshore contingent on the way, the Shell's new residents scour the desert for the fugitives. Elisa grapples with painful memories.

While Joana and Rafael race to find proof of the sabotage, Michele faces an angry crowd, and new details emerge about Glória's time in the Process.

The truth about the sabotage finally comes to light as Marcela prepares to take over the Shell -- and carry out a secret personal mission.