As Erin gets closer to the truth of her sister's fate, a final showdown awaits her on the island. Some secrets are worth killing for and not everyone will escape the island alive.
When both sisters uncover startling secrets about one of the survivors, they are dragged further into danger. A race against time begins in order to save innocent lives on the island.
With all hope seemingly lost, Lori turns to increasingly desperate measures to survive. Erin's discoveries reveal a far more complicated mystery that only leads her further from the truth.