The house backed onto the railway tracks so we only had to worry about neighbours on two sides. The garden wasn’t a jungle, but the lawn looked like it hadn’t been mown for months and sections of once neat flowerbeds were as dead as the flowerpots. The French doors that led onto the garden patio were locked and the curtains firmly drawn. We worked our way round to the kitchen. The blinds were down across the windows and the door was bolted from the inside. I watched closely, expecting Nightingale to do the lock-popping thing again but instead he just smashed the window with his cane. He reached through the pane, pulled the bolt and opened the door. I followed him inside.

Apart from the dim light it was a perfectly normal suburban kitchen. Swedish counter tops, gas hob and oven, microwave, faux stoneware jars marked sugar, tea and coffee. The fridge-freezer was switched off, notes and bills stuck to the doors with magnets. The newest bill was six months old. Next to it a note read, Grandad? Below that was a schedule that included nursery collection times.

‘There are kids living here,’ I said.

Nightingale looked grim. ‘Not any more,’ he said. ‘That was one of the things that alerted us.’

‘This isn’t going to turn out well, is it?’ I asked.

‘Not for the family that was living here,’ he said.

We crept into the hallway. Nightingale indicated that I check upstairs. I extended my baton and kept it ready as I climbed the steps. The window over the stairs had had sheets of black crayon paper crudely sellotaped over to block out the sunlight. One of the sheets had a child’s drawing of a house, square windows, a pig’s tail of smoke from a misshapen chimney and Mummy and Daddy stick figures standing proudly off to one side.

As I stepped onto the gloomy landing a word formed in my mind: two syllables, starts with a V and rhymes with dire. I froze in place. Nightingale said that everything was true, after a fashion, and that had to include vampires, didn’t it? I doubted they were anything like they were in books and on TV, and one thing was for certain – they absolutely weren’t going to sparkle in the sunlight.