What was once the Western United States is now home to the Republic, a nation perpetually at war with its neighbors. Born into an elite family in one of the Republic's wealthiest districts, 15-year-old June is a prodigy being groomed for success in the Republic's highest military circles. Born into the slums, 15-year-old Day is the country's most wanted criminal. But his motives may not be as malicious as they seem. From very different worlds, June and Day have no reason to cross paths - until the day June's brother, Metias, is murdered and Day becomes the prime suspect.

For the millions who log in every day, Warcross isn't just a game - it's a way of life. The obsession started 10 years ago, and its fan base now spans the globe, some eager to escape from reality and others hoping to make a profit. Struggling to make ends meet, teenage hacker Emika Chen works as a bounty hunter, tracking down Warcross players who bet on the game illegally. But the bounty-hunting world is a competitive one, and survival has not been easy.

Talin is a Striker, a member of an elite fighting force that stands as the last defense for the only free nation in the world: Mara. A refugee, Talin knows firsthand the horrors of the Federation, a world-dominating war machine responsible for destroying nation after nation with its terrifying army of mutant beasts known only as Ghosts. But when a mysterious prisoner is brought from the front to Mara's capital, Talin senses there’s more to him than meets the eye. Is he a spy from the Federation? What secrets is he hiding?

After the first wave, only darkness remains. After the second, only the lucky escape. And after the third, only the unlucky survive. After the fourth wave, only one rule applies: Trust no one. Now, it's the dawn of the fifth wave, and on a lonely stretch of highway, Cassie runs from Them. The beings who only look human, who roam the countryside killing anyone they see. Who have scattered Earth's last survivors. To stay alone is to stay alive, Cassie believes, until she meets Evan Walker.

To some, the Elites are heroes, here to save innocents in desperate situations. But to the Inquisition Axis, the white-robed soldiers of Kenettra, they are monsters with demonic powers who must be brought to justice. As Adelina learns more about this perilous world where politics and magic clash, she soon realizes that her own powers may be in danger of bringing on an era of panic such as the world has never seen.