She plunged into the darkness beyond the door, Kiri behind her. Lorn started to follow but froze. From behind and above them, he heard the sound of metal moving on metal. He swore, then closed the door, bolted it, and hurried after the others. “I think there’s a robot back in the ventilation duct,” he said as he caught up with Kiri and Shadow. “Well, we didn’t exactly hide our tracks,” Shadow said. “But there’s no reason it should find us down here. That duct goes on for hundreds of metres. It’ll search that first. And there are multiple shafts up and down we could have taken.” “Yeah,” Lorn said, “but only one that a guy carrying a nanotracker went down.” Shadow stopped so abruptly, Kiri ran into her. She turned, her eyes shadowed by the light on her shoulder. “Nanotracker?” she snarled

