새로운 유토피아가 탄생한걸까. 미셸리가 야심차게 설립한 사막 위의 안식처 조가비. 하지만 대규모 모래 폭풍이 불어닥치자 예상하지 못한 일이 벌어진다.

조가비에 남고 싶다면, '선발'에 참여하라. 긴장된 분위기 속에서 테스트에 임하는 사람들. 이들의 갈등이 깊어지고 주아나는 대의 멤버들에게 자신의 계획을 밝힌다.

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.