Vessels of the Imperial Navy were en route from Tarsis Ultra, but Osric knew they would not reach Trajen before this new fleet on his console did, and the thought terrified him. He caught the eye of the adept at the next console and tried to smile reassuringly, but failed to convince him.

He glanced over his shoulder at the senior magos and, despite his master's many augmentations, Osric could tell he was also extremely worried by what was drawing near.

Repeated requests to Admiral de Corte for permission to abandon the listening post had been denied and they could only wait and hope that the approaching fleet would pass them by.

The astropath sat in a reclined couch seat next to the magos, her teeth clenched, her skin drawn and pale. She twitched and muttered, her face alive with tics and nervous flutters. Her groans filled the control room, unnerving the six man staff of the listening post further still.

Suddenly she sat bolt upright, screaming at the top of her lungs.

Everyone jumped as the girl lurched from her chair, pulling at her green robes and tearing at her face with her fingernails. She fell to her knees, shrieking piteously, digging and clawing at her skin. Blood streamed down her face as she ripped open the stitching sealing her ravaged eye sockets and plunged her fingers inside, as though trying to pluck the brain from her skull.

'They are coming!' she wailed. 'They're scratching my mind, scratching, screaming, roaring - so many voices. They're coming for us - flesh and blood, body and soul!'

Osric put his hands over his ears to shut out her screams as she staggered to her feet and reached out towards him with bloody fingers, pleading for him to stop the pain.

But he could do nothing as she pitched forward and fell to the floor.

Blood pooled around her head and her cries were silenced.

Uriel joined Lord Admiral Tiberius and Philotas, his deck officer, as they examined the system map displayed on the stone-rimmed plotting table in the transept of the command bridge of the Vae Victus. A bewildering amount of information filled the embedded slate, displaying a topographical representation of the Tarsis Ultra system. Curling lines of system defence ship patrol circuits, orbits of planets and local celestial phenomena were picked out, as well as the major shipping lanes. Jump points at the system's edge were marked in yellow and each planet glowed with a soft green light. Numbers scrolled across the side of the slate, though Uriel had no idea what they indicated.

'Show me,' ordered Tiberius.

Philotas adjusted the runes on the plotting table and the background information faded from the display, leaving only the planetary details illuminated.

'At the furthest extent of the Tarsis Ultra system lies the planet of Barbarus Prime,' said Philotas, as curling High Gothic script in a gold edged box flashed next to the planet.

'A mining world,' noted Uriel. 'Precious metals and gem mines mostly, though there are a few valuable minerals used in the production of the metals that make up starship hulls.'

'Population?' asked Tiberius.

Philotas checked the information box and said. 'Quite low, the last census puts it at a little over nine thousand souls, mostly scattered throughout the uplands of the eastern continental mountain ranges.'

'What is being done about getting those people off there?' asked the lord admiral.

'A warning has been issued to the local adept, and there is a bulk freighter en route from Chordelis, though it will be touch and go whether it can reach Barbarus Prime before the first tyranid organisms.'

'Damn,' swore Tiberius. 'The more worlds that fall to the tyranids, the stronger and more numerous they become.'

'Further in towards the core worlds are two uninhabited planets. The first, Parosa, has an atmosphere largely composed of a benzene-hydrogen compound. Highly toxic and though the Adeptus Mechanicus have attempted to terraform its atmosphere several times, they have thus far been unsuccessful. The second is called Yulan. It's a geologically unstable rock, wracked by volcanic storms, though it does boast several gargantuan hydrogen-plasma mining stations in permanent geo-stationary orbit.'

Philotas zoomed in on the system map as they drew closer to the core worlds.

'Next we have Chordelis, a small, but populous world, mostly given over to industrial manufacture. Population in the region of sixteen million, with a PDF strength of fifty thousand soldiers. Evacuation protocols are in effect, though I would advise giving Chordelis a wide berth. There are a great many ships arriving and departing and there have been several accidents already.'

'After Chordelis, there are two agri-worlds, Calumet and Calydon, both with a largely caretaker population. These worlds are being evacuated as we speak. Then we have Tarsis Ultra itself, with a population in excess of sixty million.'

'How long before we are in a position to intercept the hive fleet?' asked Uriel.

Philotas adjusted the runes at the side of the plotting table once more and a series of lines snaked across the surface of the slate. The line began at the group of icons representing the Vae Victus and the ships of the Imperial fleet and quickly extended through the system to Barbarus Prime.

More numbers flashed across the slate. Philotas used a steel ruler and calipers to plot time and distance over the system map.

'At current speed, it will be seven days before we can achieve orbit around Barbarus Prime,' said Philotas. 'The tyranids will get there first.'

Osric Neru watched the approaching cloud of objects in the viewing bay with genuine, bowel-loosening terror, prayers of protection he had not given voice to since he was a child spilling from his lips. He gripped onto his console as the alien cloud enveloped them and another explosive impact rocked the listening station. For the last twenty minutes, spore-like objects had drifted from the advancing fleet, floating aimlessly through space until they neared the listening post, whereupon they pulsated rhythmically and homed unerringly on their position.

Some exploded like mines, others burst like wet sacks of liquid, spraying corrosive acids across the structure of the station. Already there were hull breaches all over the station where acids and viruses had eaten through the hull.

The size of the approaching fleet was simply too vast to comprehend. Thousands of drifting objects surrounded the alien vessels, dead lumps that the station's pitifully inadequate turrets had managed to blast apart before running out of ammunition.

Osric checked the firing log of the various turrets, calculating how many rounds had been expended. Over twenty thousand shells had been fired into the approaching cloud though the losses they had inflicted were insignificant against a force of such scale. They were now effectively defenceless.

Osric dropped to his knees and prayed as more of the alien spores drew near.

'Neru!' barked the senior magos. 'Return to your post.'

Osric stood as yet more explosions rocked the station and a fresh clutch of warning lights flashed into life on the console.

'We're going to die!' cried Osric. 'What does it matter if I'm at my post?'

'It matters because that is what we are here for,' said the magos with a calm he did not feel. 'Yes, we will die, but we will die doing our duty to the Omnissiah and the Emperor. No man can ask for more.'

Osric nodded, bowing his head and returning to his seat as the groan of buckling metal echoed from outside the control room. Another hull breach warning bell rang and the terrified crew of the listening station heard the grinding noise of pressure doors slowly sealing off the affected area.