Only those young enough can survive tetra, a dangerous drug that creates a pulse-pounding rush of enormous strength and incredible speed. Seventeen-year-old Alana West has been trained to use tetra so she can pursue the young criminals who abuse its power-criminals like the one who nearly killed her kid brother.

On tetra, Alana is unstoppable-an explosive blur as she surges through New York City. But with the clock ticking down to her eighteenth birthday, Alana will soon be too old for the rush . . . when just one more dose will prove deadly.

Supported only by her steady handler, Tucker, Alana goes undercover, infiltrating an elite gang of breaknecks to stop their supply of the drug. But when Alana gets trapped on the wrong side of the law, she learns the breaknecks are not quite what they seem-especially Ethan, the boy who seems to see the truth inside her. With her dependency on tetra increasing, Alana must decide where her loyalties lie, before the rush ends. Forever.

• A High-Stakes Dystopian World: In a near-future New York City, a powerful drug called tetra is the only thing that can stop a new breed of criminal—but using it means racing against your own eighteenth birthday.
• Superhuman Abilities: As a runner for the elite Tetra Response Unit, Alana can move faster than bullets and bend steel. But every nine-minute rush brings her closer to the end.
• An Unlikely Alliance: To stop the flow of tetra, Alana must infiltrate a gang of breaknecks. But the lines blur when she meets Ethan, a boy who sees past her mission and into her heart.
• A Fast-Paced Adventure: Packed with breathtaking rooftop chases, explosive action, and a ticking clock, this story will keep you on the edge of your seat until the very last page.