It's a target-rich environment … For both sides of this war. It's been a year and a half since they fled Los Angeles, desperate to escape the unleashed infection. An abandoned base in the isolated tundra of Alaska provides a safe harbor for the survivors. Now, turned infected are organizing. Worse, they've been given horrifying special abilities. As civilization continues to erode around Taylor and her companions, their only hope is to reach The Vault, where the last known transmission from the outside world originated. It's a risk to leave but Taylor's visions are telling them to go. They also hint that one of her companions holds a secret that could release the world from the horrors of the infection if—Taylor can manage to keep her safe. When betrayal sells them into the hands of their enemies, Taylor must use her evolving powers to protect their only hope of salvation or join the dark evolution.