Back in 2029, a virus of unprecedented power had swept through the world's computer systems, scrambling data and frying hardware. To fight the plague, the government of what was then called the United States created a special top-secret group known as Echo Mirage. The team did eventually beat the virus, but few of the special cadre survived with their sanity intact. They were deckers at a time when a direct neural interface produced sensory overload, and, often, incurable psychosis.