Wiggins' sequel to Stung (2013) continues the story of a post-apocalyptic world in which stings from genetically modified bees cause people to turn into violent beasts. Now cured, Fiona Tarsis and her twin brother, Jonah set out to find their mother. They're headed for a safe settlement rumored to be in Wyoming and along the way they plan to administer the cure. The siblings encounter the handsome Kevin who quickly becomes one of their allies. But the more they get to know him, the more suspicious they are of Kevin and his possible ties to the raiders who will do anything they can to destroy the cure.