After surviving a devastating virus that has claimed millions, Emery discovers she's one of the rare enhanced-those transformed by the disease into something more than human. Her closest friends, immune to the virus, form a protective circle around her, fulfilling a promise they made to her late sister, Olivia, to always look out for her. But as soldiers begin rounding up survivors, and the world descends into chaos, Emery and her group must navigate a landscape where being different is dangerous, and trust is a luxury. Together, they'll face impossible choices, uncover buried secrets, and fight to survive in a fractured world where the line between friend and enemy is blurring by the day.