15-year-old Amy Cahill only has few days to live. There's a poison coursing through her, and her only chance is to collect ingredients for an antidote. Too bad the antidote ingredients are scattered around the world. And too bad that survival is by far Amy's smallest problem. The antidote she needs is also the only thing capable of stopping a deadly enemy. Amy and her younger brother, Dan, will do everything it takes to bring Pierce down. Even if Amy must pay the ultimate price.