The Salamanders had followed the Apothecary’s signal like a beacon. It had led them south at first, back the way they had come, to a hidden entrance into the Cirrion sub-levels. The tunnels were myriad and did not appear on any city schematic, so Argos had no knowledge of them. The private complex of passageways and bunkers was reserved for the Stratosan aristocracy. Portals set in the tunnel walls slid open with a ghosting of released pressure and fed off into opulent rooms, their furnishings undisturbed and layered with dust. Reinforced vaults lay unsecured and unguarded, their treasures still untouched within. Several chambers were jammed with machinery hooked up to cryogenic flotation tanks. Purple bacteria contaminated the stagnant gel-solutions within. Decomposed bodies, bloated with putrefaction, were slumped against the glass, their suspended existence ended when the power in Cirrion had failed.

Kadai raised his hand from up ahead and the Salamanders stopped.

Nearby, one step in the chain from Tsu’gan, Iagon consulted his auspex.

‘Bio-readings fifty metres ahead,’ he hissed through the comm-feed.

The thud-chank of bolters being primed filled the narrow space.

Kadai lowered his hand and the Salamanders slowly began to proceed, closing up as they went. They had yet to meet any cultist resistance, but that didn’t mean it wasn’t there.

Dak’ir heard something move up ahead, like metal scraping metal.

‘Hammer!’ a voice cried out of the dark, accompanied by the sound of a bolt-round filling its weapon’s breech.

‘Anvil!’ Kadai replied with the other half of the code, and lowered his pistol.

Twenty metres farther on, a wounded Salamander was slumped against a bulkhead, his outstretched bolt pistol falling slowly.

The relief in Kadai’s voice was palpable.

‘Stand down. It’s Fugis. We’ve got him.’

Banen stepped from the shadows with the small band of survivors. Short and unassuming, he wore a leather apron and dirty overalls that bulged with his portly figure. A pair of goggles framed his grease-smeared pate.

He didn’t look like a man with the power to wipe out a city.

The gravitas of the decision facing Kadai was not lost on him as he regarded the human engineer.

‘You can vent the atmosphere in Cirrion, cleanse the city of the gas?’

‘Y-yes, milord.’ The stammer only made the human seem more innocuous.

The Salamanders formed a protective cordon around the bulkhead where Fugis and the survivors were holed up, bolters trained outwards. The Apothecary’s leg was broken, but he was at least still conscious, though in no condition to fight. With the discovery of the Apothecary an eerie silence had descended on the tunnel complex, as if the air was holding its breath.

Salamanders encircling them, Kadai stared down at Banen.

I will be signing the death warrant of thousands…

‘Escort them back to Aereon Square,’ he said to Brother Ba’ken. ‘Commence the cleansing of the city as soon as possible.’

Ba’ken saluted. The Salamanders were breaking up their defensive formation when the held breath rushed back.