Heartbroken but more determined than ever after a tense showdown in the woods, sixteen-year-old Tess once again returns to the safety of her community of Isolationists. Bolstered by new alliances and desperate to protect those she loves, this time she knows she can return stronger and more powerful than ever to take back what is hers.As she trains in combat and grows more confident, Tess receives beautiful letters penned by her forbidden love, the chosen one James, from his prison at the council's headquarters. He is now serving as a bodyguard to the creators—the team of scientists who created artificial life in the first place. And what he has discovered about the true origin of the illness that halted natural life could change everything. Enemy will become ally and death will bring new hope in this stunning conclusion to Tiffany Truitt's epic Lost Souls trilogy.