Some cultures say the ouroboros symbolizes infinity. Others claim the snake or dragon depicted eating its own tail represents the cyclic nature of life and death. But just as Cam Mackintosh and Freyja Jorgensen's lives are experiencing their own rebirth, their sustainable community is threatened. The ex-lovers are unexpectedly thrust together again to defend those they care about. In the third installment of this romantic dystopian series, friendships are tested when the survivors finally learn the horrifying truth about why they were chosen. Facing a diabolical plot that makes them question everything they value--will their relationship survive? Or will Cam and Freyja find themselves repeating the same mistakes?