Sarah seeks help from Walker to get the mycosis cure and her team off of the island. Meanwhile Alan decides to destroy Mother but is interrupted by Peter leading to unexpected outcomes for everyone. Meanwhile, Sister Amy seeks to get her revenge on Anne.
Alan finally finds a cure and is able to save Kyle. Meanwhile, Peter takes over the Abbey under his new name "Eli" and stops Kyle, Sarah and Soren from leaving the island. Alan and Julia find the Mother Tree.
As the team prepares to evacuate the island, they learn that the Navy has already decided to make sure no one leaves the island by implementing a deadly Plan B. Alan's only hope is to find the cure. Meanwhile, Peter and Anne start to making plans for their future together.
As Kyle gets worse, Soren takes the team to the Bleeding Tree. At the Abbey, Peter learns about Michael's breeding program, and Julia offers a new idea how to grant Amy immortality in exchange for Mother.
Julia arrives at the Island along with Sergio where they meet Peter at the Abbey. Meanwhile, Alan, Kyle and Lt. Winger go into the woods searching for what may be a cure for the pathogen.
Sister Amy makes a move with her own plans and deals with Michael. Meanwhile, the Coast Guard returns with news that the outbreak has spread and orders the CDC team to evacuate to another island but complications arise.
Alan comes to, vaguely remembering what he did to Sarah who has to realize she suffered a tragic loss. Elsewhere, Walker decides to go to St. Germain after learning about Brother Michael.
The CDC team are forced to work together when another outbreak threatens to overwhelm the Abbey. Back in Paris, Julia tries to find an alternative to Ilaria's NARVIK-C virus.
Peter reveals his brother's true identity and gets them both in trouble. Meanwhile, Kyle tries to quarantine the orchard and the infected bee hive but runs into resistance.
After being stung by a bee, a worker gets sick, leading Kyle to investigate the bees. Meanwhile, Sarah looks for the child who recovered and Peter calls Balleseros for further instructions. In the future, Julia and Hatake get into a fight for life or death.
Jordan and Peter travel outside the safety of the abbey to retrieve some specimens and discover just what's living in the woods. At the same time, Sister Amy plots to make the CDC team leave forever.
The CDC team continue to investigate the island; at the same time, they come in contact with a sick child who is miraculously healed, which causes Jordan to suspect that something isn't right about the abbey. Meanwhile, in the future, Walker and Caleb dig up Alan's grave and make a baffling discovery.moreless
In the second-season premiere, those who survived the horrors of Arctic Biosystems attempt to move on with their lives. However, they find themselves unable to escape the long reach of Ilaria Corporation as they battle a new deadly virus on a mysterious wooded island inhabited by a cult that has no ties with the outside world.moreless