Ever since the Titans appeared in her Detroit neighborhood, Astrid Sullivan's world has revolved around the mechanical horses. It's not just the thrill of the race. It's the engineering of the horses themselves and the way they're programmed to seem so lifelike. The Titans are everything that fascinates Astrid, and nothing she'll ever touch.She hates them a little, too. Her dad lost everything betting on the Titans. And the races are a reminder of the gap between the rich jockeys who can afford the expensive machines and the working class friends and neighbors of Astrid's who wager on them.But when Astrid's offered a chance to enter an early model Titan in this year's derby, well, she decides to risk it all. Because for a girl from the wrong side of the tracks, it's more than a chance at fame or money. Betting on herself is the only way she can see to hang on to everyone in the world she cares about.