The Great Network is an ancient web of routes and gates, where sentient trains can take you anywhere in the galaxy in the blink of an eye. But the Network is also a hazardous mess of twists and turns, and nothing is as it seems. So when petty thief and railhead Zen Starling is hired by the mysterious Raven, the job appears simple enough. Steal one small box from the Emperor’s train, live the rest of his days in luxury. Secrets and danger lie in wait on the rails, and that little box might just bring everything in this galaxy—and the next—to the end of the line.