Whirlwind adventure and thought-provoking themes come together in this science fiction adventure about two worlds, four friends, and one impending disaster.34 Jet and 31 Stoke are bright young pilots from Earth of 2816, a stratified, authoritarian society where everyone lives in massive indoor cities. Kessa and Marta are close but contrasting sisters from the planet of New Gaia, a naïve, egalitarian, rural Eden with no cities at all. The sisters travel to Earth and meet Jet and Stoke just as a mysterious and deadly toxin begins to appear in the planet's food supply, threatening worldwide disaster. The crisis spins rapidly out of control and Earth's authorities try desperately to cover it up, but the four new friends discover the secret and find themselves in a heart-pumping race to evade police, navigate each other's strange worlds, find romance, and solve a scientific mystery in a do-or-die quest to save the planet.