Earth and Mars are in open conflict, and seventeen-year-old Leo Fischer is right in the thick of things, fighting his own secret war behind enemy lines.
When a mission goes tragically wrong, Leo has to get away from Mars, and for that he'll need the help of the one person he knows he can truly trust – Skater Monroe. But Skater is off somewhere in the Asteroid Belt, and the last time they spoke she wanted to punch his lights out.
And besides, Leo's bitterest enemy – Carlton Whittaker, the crazed president of Mars – is about to unleash his most devastating weapon against the unsuspecting Terran invasion fleet. Is now really the time to abandon the fight?
In this nail-biting climax to the Mars Alone trilogy, Leo must face his greatest challenge yet. He has the chance to save two worlds, but at what cost to himself?