I lost my left hand on Sameter. This is how it occurred. On the thirteenth day of Sagittar (local calendar), three days before the solstice, in the mid-rise district of the city of Urbitane, an itinerant evangelist called Lazlo Mombril was found shuffling aimlessly around the flat roof of a disused tannery, lacking his eyes, his tongue, his nose and both of his hands.

Urbitane is the second city of Sameter, a declining agro-chemical planet in the Helican subsector, and it is no stranger to crimes of cruelty and spite brought on by the vicissitudes of neglect and social deprivation afflicting its tightly packed population. This act of barbarity stood out for two reasons. First, it was no hot-blooded assault or alcohol-fuelled manslaughter, but a deliberate and systematic act of brutal, almost ritual mutilation.

Second, it was the fourth such crime discovered that month.

I had been on Sameter for just three weeks, investigating the links between a bonded trade federation and a secessionist movement on Hesperus at the request of Lord Inquisitor Rorken. The links proved to be nothing – Urbitane’s economic slump had forced the federation to chase unwise business with unscrupulous shipmasters, and the real meat of the case lay on Hesperus – but I believe this was the lord inquisitor’s way of gently easing me back into active duties following the long and arduous affair of the Necroteuch.

By the Imperial calendar it was 241.M41, late in that year. I had just finished several self-imposed months of recuperation, meditation and study on Thracian Primaris. The eyes of the daemonhost Cherubael still woke me some nights, and I wore permanent scars from torture at the hands of the sadist Gorgone Locke. His strousine neural scourge had damaged my nervous system and paralysed my face. I would not smile again for the rest of my life. But the battle wounds sustained on KCX-1288 and 56-Izar had healed, and I was itching to renew my work.

This idle task on Sameter had suited me, so I had taken it and closed the dossier after a swift and efficient investigation. But latterly, as I prepared to leave, officials of the Munitorum unexpectedly requested an audience.

I was staying with my associates in a suite of rooms in the Urbitane Excelsior, a shabby but well-appointed establishment in the high-rise district of the city. Through soot-stained, armoured roundels of glass twenty metres across, the suite looked out over the filthy grey towers of the city to the brackish waters of the polluted bay twenty kilometres away. Ornithopters and biplanes buzzed between the massive city structures, and the running lights of freighters and orbitals glowed in the smog as they swung down towards the landing port. Out on the isthmus, through a haze of yellow, stagnant air, promethium refineries belched brown smoke into the perpetual twilight.