With rebel leader Darian free at last, the humans and outsiders on Ixeos must find a way to join forces and defeat the Firsts. The problem? All slaves are tracked with GPS, the Firsts are the only ones with power, and roving gangs hate the rebels just as much as they hate the aliens. As Darian and the outsiders from Earth travel the globe through the mysterious tunnels in Paris, they learn that the Firsts are preparing to launch another wave of biological warfare. With a transporter that will allow the aliens to target any city, anywhere on the planet, the rebels know they must stop them at all costs. As things get more dangerous on Ixeos, the outsiders find that they're pushed to their limit. Will they fight for freedom, no matter the price?