In a world broken by war, a team of young warriors is willing to sacrifice everything to save what they love. The Karensa Federation has conquered a dozen countries, leaving Mara as one of the last free nations in the world. Refugees flee to its borders to escape a fate worse than death—transformation into mutant war beasts known as Ghosts, creatures the Federation then sends to attack Mara. The legendary Strikers, Mara's elite fighting force, are trained to stop them. But as the number of Ghosts grows and Karensa closes in, defeat seems inevitable. Still, one Striker refuses to give up hope. Robbed of her voice and home, Talin Kanami knows firsthand the brutality of the Federation. Their cruelty forced her and her mother to seek asylum in a country that considers their people repugnant. She finds comfort only with a handful of fellow Strikers who have pledged their lives to one another and who are determined to push Karensa back at all costs. When a mysterious prisoner is brought from the front, Talin senses there’s more to him than meets the eye. Is he a spy from the Federation? Or could he be the weapon that will save them all?

Explosive action and swoon-worthy suspense collide in this riveting conclusion to the Skyhunter duet from #1 New York Times–bestselling author Marie Lu As a Striker, Talin was taught loyalty is life. Loyalty to the Shield who watches your back, to the Strikers who risk their lives on the battlefield, and most of all, to Mara, which was once the last nation free from the Karensa Federation’s tyranny. But Mara has fallen. And its destruction has unleashed Talin’s worst nightmare. With her friends scattered by combat and her mother held captive by the Premier, Talin is forced to betray her fellow Strikers and her adopted homeland. She has no choice but to become the Federation’s most deadly war machine as their newest Skyhunter. Red is no stranger to the cruelty of the Federation or the torture within its Skyhunter labs, but he knows this isn’t the end for Mara – or Talin. The link between them may be weak, but it could be Talin and Red's only hope to salvage their past and safeguard their future. While the fate of a broken world hangs in the balance, Talin and Red must reunite the Strikers and find their way back to each other in this smoldering sequel to Marie Lu’s Skyhunter.