A dead satellite starts transmitting again, and the signal it sends back is coming from a place that shouldn't be able to send anything at all. Ethan Blackwell, Mara Whitlock, and Daniel Cross trace the broadcast across hundreds of miles of dead radio silence to a rusted, decommissioned antenna array buried in the desert - a station that was supposed to have been shut down and forgotten decades ago. What they find waiting for them there is not a malfunction. It's an answer to a question none of them asked.