The 24th century, the Earth's States have come together in a world state, the Federation, where order and virtue are the watchwords. But the confines of the galaxy, an arachnid army stands against the human species and threat it directly, by destroying Buenos Aires infew minutes. The Federation urges the youth to sacrifice and selflessness. Driven by their teacher, the students Johnny Rico and Dizzy Flores found themselves in the infantry, while Carmen Ibanez is destined to become a spaceship pilot, and Carl Jenkins became an intelligence officer. But young people are far from suspecting what awaits them on the edge of space.