Bookish Brit Adam Gibson is one wonky heartbeat away from a fatal arrhythmia. But staying alive requires Adam to become keenly focused on both his pulse and the many different daily medications he must take in exactly the right dosages. Adam's torn between wanting to live and knowing that someone else must die in order for him to do so. He needs a new heart. The pressure is getting to him. Adam stops talking to his friends back home, refuses to meet kids at his new school, and shuts his parents out entirely. His days are spent wondering if can cope with having a dead man's heart beating inside his chest, or if he should surrender to the thoughts of suicide swirling around in his head. And then a donor is found… Outspoken artist Darby Fox rarely lets anything stand in her way of achieving her goals . Whether it’s painting, ignoring her homework (dyslexia makes a mess out of words anyway), kissing a hot boy she doesn't even know, or taking the head cheerleader down a peg , no one has ever accused Darby of being a shy. She also happens to be the twin sister to a perfect brother with good looks, good grades, manners, and the approval of their parents - something Darby has never had. Darby's always had bad timing . She picks the worst time to argue with her brother Daniel. In a car with bald tires, on an icy road in the freezing cold, the unthinkable happens. In a split-second, everything changes. When life forces Adam and Darby together, undeniable sparks fly, and a deep connection is made. But the secret inside of Adam may be the thing that pushes them apart forever.