The first burst had come immediately Valseir had spoken the name of the Dweller he’d given the folder to. Could it really just have been coincidence? But how could anybody have overheard? They were communicating by whisper signal, coherent light beams flickering from one surface-sunk transceiver pit to another. There was no way to intercept what they were saying unless someone dropped a mirror or some sensor into the beams.
Could it be him? Had the gascraft itself been bugged? Had Hatherence put something on him? He scanned and system-checked, finding nothing.
The Blimper above them ascended quickly and steadily as the GasClippers roared up the sheer face of the storm. The Dzunda rose into direct sunlight.
— So, just a field of equations ? Fassin asked the old Dweller.
The drug-fume haze in the private box was suddenly lit up, resolving into tiny individual particles of vapour, a tiny fraction of them glinting and glittering.
— Possibly just the one long one.
Horrified, Fassin sucked a little of the surrounding vapour into the arrowhead’s high-res analysis unit.
— One piece of algebra? he asked.
The results coming from the gascraft’s high-tech nose looked bizarre, surface receptors seeming to change their mind about what they were smelling. Fassin toggled the analysis down another level of detail to electron microscopy.
— Possibly, Valseir replied.
Outside, towards the Storm Wall, a few tens of metres away, something showed, briefly caught in the slanting sunlight and taking just an instant too long to adapt to the new lighting conditions.
The results from the arrowhead’s internal electron microscope were for a moment baffling. Then Fassin realised what his analysis unit was looking at. Nanotech. A thin soup of tiny machines, receptors, analysers, processors and signallers, small enough to be suspended in the atmosphere, light enough to float in the midst of the drug smoke like particles of the fumes themselves. That was how they’d been bugged. There was something in the gas between them, riding right in the middle of their signal beams and capable of picking up their meaning. Nothing as gross as a mirror or some photon microphone dangling from a wire, just this, just these, just stuff that was supposed to be banned.
— Valseir, he sent urgently. — Who brought this drug bowl in here?
He turned up visual magnification, staring hard at the point in the open gas outside, where something had shown in the sunlight an instant before. There. He up-magged again, almost to the point of graininess.
— What? Valseir said, sounding confused. — Well, it was here when I -
A rough sphere, forty metres away, barely ten centimetres across, almost perfectly camouflaged, like a disc of clear glass in front of the real view. Hint of a comms pit, a tiny crater-like dish, pointing right at them. Fassin swung round to put himself between the tiny, distant machine and the old Dweller, then went right up to him, comms pit to comms pit like amorous Dwellers kiss-signalling.
Valseir tried to rote back. — What the — ?
· We’ve been bugged, Valseir, Fassin sent. — Watched, listened to. The bowl smoke is part nanotech. We need to get out, now.
· What? But -
Another burst of neutrino comms. Now that he knew where to look, it was definitely coming from the camouflaged sphere outside.
— Out, Valseir. Now.
And another burst. This time from above. High above. Valseir pushed Fassin away. — The bowl smoke… ?
— Get out! Fassin sent, pushing the old Dweller towards the access port in the top of the diamond bubble box.
Outside, the little sphere was rushing towards them. Fassin got underneath Valseir and forced him upwards.
— Fassin! All right! Valseir started to rise under his own power, entering the vertical access tube. The little sphere burst through the diamond bubble, shards spraying. It came to a stop just inside the jagged hole, still disguised, just a blur in the air.
“Major Taak!” it shouted. “This is General Linosu of the Shrievalty Ocula. This device is under the control of the Nasqueron Expeditionary Force. Don’t be alarmed. We’re coming down to—”
The voice cut off as the little sphere was pierced by a hair-thin line of cerise light. The noise resounded, sharp and sudden, round the diamond bubble enclosure. Debris flew from the tiny machine, rattling against the far side of the private box. Fassin whirled to see Hatherence dropping down round the side of the Dzunda, carapace silvered. The laser beam had come from her. The little spherical device dropped its disguise, revealing itself as a mirror-finish machine with stubby wings. It had a tiny hole in one flank, a much larger one on the far side, producing smoke. It rolled over in the air, made a crackling noise, then dropped to the transparent floor. Above him, Fassin was aware of Valseir hesitating in the access tube. Slipstream wind whistled in through the hole in the diamond bubble.
The colonel swung quickly in towards them. — You all right, major? she signalled, stopping immediately outside, buffeted by the slipstream. She tipped to look at the device lying rolling on the clear curved floor of the box.
— Shit, she sent. — That looks like one of ours. There was a white flash, as though from everywhere at once, blinding Fassin for an instant. As the light faded Hatherence was already falling away, tumbling like a dropped stone through the gas. Something moved, faster than the GasClippers, across the StormWall face, carving in towards the Blimper.
When the colonel had fallen twenty metres below the private box, a line of searing yellow-white light flicked into existence between the incoming machine and Hatherence’s esuit, which erupted in fire and blew apart. The fast-moving device looked like a small gascraft or missile, sharp and finned. Its exhaust flared bright as it powered round.
Fassin looked down to see Hatherence. She was a dark, ragged manta shape falling, whirling downwards amongst the smoking debris of the destroyed esuit. She seemed to twist in the air, flicking round, something glinting in a stubby tentacle; a violet beam lanced towards the finned craft, missing by a metre. Another white line from the machine speared the colonel, obliterating her in a sun-bright burst of light.
Valseir had cleared the access tube. Fassin blasted up it like a shell up a gun barrel, letting the pulse of down draught tear the diamond bubble box out in a convulsive explosion of wreckage that whipped away from the Dzunda and followed the remains of the colonel and her esuit towards the storm’s concave base and the Depths beyond.
Valseir was waiting in the broad corridor above. “Fassin! What is going on?”
“How do we get off this thing?” he asked, taking the old Dweller by the hub-arm and leading him towards the next vertical access.
“Do we really need to?”
“Something’s attacking us, Valseir.”
“Are you sure?”
“Yes. So how do we get off?”
“What’s wrong with roting?”
“Bit vulnerable. I was thinking of a craft.”
“Well, I’m sure we can arrange a taxi. Or one of the Blimper’s own skiffs. I’ll ask Captain Xessife.”
“No,” Fassin said. “Not Captain Xessife.”
“Why not?”
“Somebody had to put that drug bowl there.”
They got to the vertical. “But…’ Valseir hesitated. “Wait, what’s that noise?”
Fassin could hear a deep warbling sound coming from various directions. “That could be an alarm.” He indicated the tube above. “After you. Let’s move.”
They were halfway up the vertical to the central corridor when the Dzunda lurched. “Oh-oh,” Valseir said.
“Keep going.”
When they got to the main concourse, the alarm noise was louder. Dwellers were shouting at each other, picking up dropped trays, food and drugs and staring at some of the wall-screens. Fassin looked too. “Oh fuck,” he said quietly.