'Where were you last night?' I asked.

'I was visiting a client, if you must know. I don't do all my work here.'

'What time did you get back?' My voice was hushed and passionless as I tried to disguise my shock and fear.

'What is this, Lyosha?' she said, rising to her feet in anger. 'You know what I do. Do you want details all of a sudden?'

'Tell me!' I moaned with a pleading intensity, leaning across the bed towards her. She knelt down beside the bed and put her hands to my face.

'What is it, Lyosha?' she asked, staring into my eyes to discover what had brought this on in me. 'Why are you like this?'

'I saw you with Iuda last night,' I told her simply.

'What?' Her incredulity appeared genuine.

'Through that window,' I explained, pointing. 'I was watching.'

'You were spying on me?' She was more disappointed than angry.

'It's too late for that,' I said, taking her by the wrists and rising to my feet. 'I saw the two of you together and I saw what you did.'

'Lyosha, I saw no man in this room last night.' She was icy calm, perceiving that her life might depend on what she told me.

'Ha!' I snorted. 'You should be a lawyer. You saw no man, but you saw Iuda.'

'I didn't return here until almost midnight, and then I went straight to bed. Tell me what it was that you saw.'

'I saw what happened. I saw you and him, together. I saw him when he carried you over to the window. I saw when he bit you.

I saw when you…'

Domnikiia put her hand to the collar of her nightdress and ripped it away to expose her neck. 'If he bit me, then where are the marks?' She arched her head first to one side and then the other, stretching her neck so that I could clearly see that there was no sign of any contact with a vampire.

Dumbstruck, I put my hand to her throat and stretched the skin, peering closely to verify what was already quite evident. I sat back down on the bed, bewildered, and she sat beside me. I lay my head in her lap and stared vacantly at the ceiling.

'I think perhaps you dreamed it, Lyosha,' she said soothingly, reminding me, for the first time, quite specifically of my mother. I shook my head miserably.

'No. It was no dream. I saw it. I saw something.'

'And you thought I had become a vampire?' There was a mocking tone in the question.

'Yes,' I said, and a tear came to my eye. I took her hand in mine and pressed it to my lips. She thought for a moment before the obvious question came to her.

'So what were you doing here this morning?'

'I came to kill you.'

She took it well. 'I see.'

'But I couldn't,' I explained.

She thought for a moment longer. 'So…' She didn't complete her question. Instead I felt her hands on my chest, pulling my shirt open, searching for something. 'You're not wearing it,' she said. 'The icon – you've taken it off.'

'I gave it to Dmitry.'

'But it would have protected you. If I had been… If I had been a vampire, I could have killed you – or worse. Are you mad? You gave away your only protection.'

'It doesn't work as protection,' I explained. 'They're not superstitious.'

'I'm superstitious,' Domnikiia shouted. 'It would have kept me off you.' She thought for a moment more. 'Is that what you wanted?' she asked, incredulous. 'You're an idiot, Aleksei Ivanovich; a sentimental idiot.' She paused before adding quietly, 'But thank you.'

'As if anything could keep you off me,' I muttered. She smiled and then bent forwards to kiss me.

'We still don't know what you saw,' she said, returning to the point. 'Perhaps they can do that – change their faces to look like someone else.'

'I never saw her face,' I confessed. I had realized already that my reasons for supposing it had been Domnikiia at all were scarcely substantial.

'Well, it looks like I had a lucky escape. I wouldn't like to have been killed by an idiot while I slept. So what did you see?'

'Just her back – her hair. It was so like yours.' I had already realized the implication.

'Oh my God!' whispered Domnikiia. 'Margarita! She sometimes uses this room when I'm not here. It's bigger than hers. The connecting door's never locked.' She sprang to her feet and went over to the door.

'Wait!' I called. 'Given what I saw, she'll be a vampire too by now.'

'So what am I supposed to do, just leave her?'

'Let me go first.'

'What if she is a vampire?'

'It's daytime,' I explained. 'She won't be able to do much.'

I picked up my dagger from the chair and then went over to the door. I felt Domnikiia, behind me, pressed close to my body. For all that I feared for her safety, it was reassuring to have her there. As I turned the door handle, I felt a debilitating weariness within me. I had no more stomach to be chasing around Moscow killing vampires, or even killing Frenchmen. I just wanted them all to go away and leave me to enjoy my life. But I knew I had to go on. I opened the door.

Inside, it was dark. The curtains were closed and in the little light that there was, I could make out a figure on the bed.

'Stay there,' I whispered to Domnikiia, and I began to edge my way towards the window, keeping my back always to the wall. When I got there, I wasted no time in pulling the curtain to one side and flooding the bedroom with light.

Iuda had not changed his attitude towards offspring. He remained, as he had once told me in that room of rotting corpses, free from the responsibility of long-term consequences. The purpose of the previous night's theatricals had not been to convert Margarita into another vampire who could accompany Iuda across the centuries. It had been purely a charade for my benefit, so that I would believe that Domnikiia had become a vampire and would then, as I so nearly had, kill her. For me to know that she died at my hand would make a vengeance upon me far sweeter than anything that Iuda could have done to her.

But once the performance had been acted out, Iuda had no further need for the bit players. On the bed, Margarita lay naked on her back. Her legs were together and straight and her arms lay limply stretched out on either side of her, in a grim mimicry of our crucified Lord. Her long, dark hair radiated from her head across the pillows like a halo, surrounding a face from which her dead eyes gazed blankly at the ceiling.

To her right side, sheets and pillows were drenched in vivid, red blood, which was also smeared over her stomach, breasts and cheeks. The right side of her throat was ripped open in a style that only a voordalak could achieve.

Domnikiia screamed.

Domnikiia did not stay at the brothel after that. None of them did. The authorities began an investigation. A brief look at my papers was enough to persuade them not to pester either myself or Domnikiia, although I doubt whether it did much to convince them of my innocence. I could have told them to terminate the investigation with all possible haste, but I chose not to. I wanted the nature of Iuda and the other Oprichniki to be known by everyone, but it was something that the police would have to find out for themselves. A simple account of the truth from me would not be believed.

As it was, they showed little interest in the history of one more body amongst the thousands. They were more concerned with identifying those in Moscow who had collaborated with the invaders. If they had chosen to speak with Domnikiia, they might well have perceived a discrepancy between her description of Margarita's body and what they found. An additional wound would have appeared.

After I had guided Domnikiia out of her colleague's room and into her own, but before summoning the police, I had returned to see Margarita once more. Her body was lifeless. Her dead eyes gave no reaction to changes in the light. Her flesh did not burn when it came into contact with the sun. For all anyone could tell, Iuda had caused her death, not begun her transformation. But I recalled another body that I had once seen in a not dissimilar state – the body of a young Russian soldier named Pavel, carried on a wooden cart through the streets of Moscow. He too had seemed dead. He too had been able to lie unaffected under the gaze of the sun. But his body had not decayed, the reason being that he had exchanged blood with a vampire and so had, within days or weeks, become one.