Robyn Kinley remembers when a mountain bike meant freedom. Then the Pulse hit. The lights went out. And everything changed. Now, only the Independents-riders who refuse to give in-stand against the violence that rules the city. When a split-second decision grants Robyn a bike of her own, she's forced into an uneasy alliance with the volatile Nate Cooper. But one wrong move is all it takes to endanger everything they care about and send Robyn...