Iris welcomes an enigmatic ally to their community while Hope questions the visitor's motives. A message upends the sisters' worldview, forcing them to decide between the safety of their home and the uncertainty of the world beyond.

The group adjusts to the reality of life beyond the walls of their community. Iris tries to take over, despite Hope's reservations. Felix and Huck follow the teenagers, while Felix is ​​forced to face unwanted memories.

Overwhelmed by the past, group members adopt opposite strategies to deal with a huge obstacle. Pressure on the group to return home.

The group seeks shelter from a storm inside an abandoned school. While supplying, they imagine what life was like in high school and encounter new threats, both alive and dead.

While the group works together to cross the Mississippi River, a plot to take the teenagers home hits an obstacle. A group member must overcome past traumas to save others from an oncoming threat.

When an unexpected newcomer reveals information that can help them reach their destination, the group makes a deal. While some are intrigued by the new arrival, others are suspicious.

A horrible discovery finds the group at a crossroads and leads one of them to revisit past traumas.

A series of setbacks causes a member of the group to reevaluate their role in the mission. Someone makes an amazing discovery. A surprising revelation casts everything in a new light.

A divided group struggles to get together. Others turn to the greater good.