Mankind's first alien contact tears into Earth: projectiles launched from Jupiter's moon, Ganymede, have vaporized whole cities. Under siege, humanity gambles on one desperate counter strike. In a spacecraft scavenged from scraps and armed with Vietnam-era weapons, foot soldiers like 18-year-old Jason Wander - orphans that no one will miss - must dare man's first interplanetary voyage and invade Ganymede. They have one chance to attack, one ship to attack with - and their failure is our extinction

Extraterrestrial life has led Earth's population to the verge of extinction – and humanity's future hangs in the balance. It seems that only Jason Wander has the experience, and the guts, to do what must be done. But he will sure need some help…