| SOURCE: UNKNOWN | STATUS: DELIVERED
The PDF flipped to page four. A waveform visualizer appeared. The echo wasn't a file. It was a message loop. Someone—or something—had sent a B2-class data echo backward through a quantum cache, and the only way to close the loop was for Aris to respond .
For three years, he had hunted a phantom known in underground data circles as Echo B2 Pdf .