First, the virus took Kaelyn's friends, then her family, and now it's spread beyond her island. No one is safe. But when Kaelyn finds samples of a vaccine hidden in her father's abandoned laboratory, she knows there's only one option: seek out someone who can replicate it. As Kaelyn and her friends head to the mainland they face greater challenges than they ever could have imagined. Not everyone they meet wants Kaelyn to succeed-and many simply want her dead and the vaccine for themselves. With the chance of finding help slipping away, will Kaelyn be forced to sacrifice those she loves in order to rescue the human race? Megan Crewe's second installment in this powerful and gripping YA series tackles self-preservation, first love, and hope. This heart-wrenching story of one girl's bravery and unbeatable spirit will leave readers fervently awaiting the final book in this suspenseful and action-packed trilogy.