A deadly virus has destroyed Kaelyn's small island community and spread beyond the quarantine. No one is safe. But when Kaelyn finds samples of a vaccine in her father's abandoned lab, she knows there must be someone, somewhere, who can replicate it. As Kaelyn and her friends head to the mainland, they encounter a world beyond recognition. It's not only the "friendly flu" that's a killer - there are people who will stop at nothing to get their hands on the vaccine. How much will Kaelyn risk for ...