When humanity reaches for the stars, our probes are destroyed. They crash into an incredibly advanced piece of a massive force-field. Unknown beings have placed a barrier around our star and planets, enclosing us within. We’re locked inside a Great Sphere. Was this invisible obstacle built to imprison us—or to protect us? No one knows the truth, but it soon becomes clear the barrier has leaks. Aliens infiltrate and try to sabotage our efforts to escape our cage. A warship crewed by military people and scientists beta-test an engine designed to pass through the barrier. Chief Gray, a security officer from Control, is assigned to help. His mission is Earth must escape her bonds at all costs, even if it means war with our hostile neighbors.