It was damp and clammy, still shiny with spit where it had been bitten.

Saul put it near his mouth. He let his mind play over the filth of the dustbin, waited for his stomach to turn. But it did not.

His mind still rang with admonishments heard long ago — don’t touch, it’s dirty, take it out of your mouth but his stomach, his stomach remained firm. The smell of the meat was enticing.

He willed himself to feel ill. He strove for nausea.

He took a bite. He wriggled his tongue into the meat, pushed apart the fibres. He probed, tasting the dirt and decay. Lumps of gristle and fat split open in his mouth, mixed with his saliva.

The burger was delicious.

Saul swallowed and did not feel ill. His hunger, piqued, demanded more. He took another bite, and another, eating faster and faster all the time.

He felt something slipping away from him. He drew his strength from the old cold meat, food that had surrendered to people and decay, and now to him. His world changed.

King Rat nodded and ate on, grabbed handfuls and shoved them into his mouth without looking at them.

Saul reached for a slimy chicken wing.

In the street, only twenty feet away, children were appearing in outsized school uniforms. The bricks and the bags kept Saul and King Rat hidden. They looked up as the children passed, paused briefly in their breakfast.

They were silent while they ate. When they had finished, Saul licked his lips. The taste of filth and carrion was very strong in his mouth, and he investigated it, still wondering that it did not turn his stomach.

King Rat nestled into the bags and pulled his coat about him. ‘Feeling better now?’ he asked.

Saul nodded. For the first time since his sudden release, he felt calm. He could feel the acids of his stomach getting to work inside him, breaking down the old food he had eaten. He felt molecules scurrying out of his gut, carrying strange energy from the ruins of other people’s suppers and breakfasts. He was changing from the inside out.

My mother was like this creature, he said to himself, this skulking thing. My mother was like this thin-faced vagrant with magical powers. My mother was a spirit, it seems, a dirty spirit. My mother was a rat.

‘You can’t go back, you know.’ King Rat looked at Saul from under his eyelids. Saul had long given up trying to make sense of his features. The light would not fall full on King Rat’s face, no matter where he stood or lay. Saul glanced at him again, but his eyes found no purchase.

‘I know it,’ he said.

‘They think you did your pa, and they’ll do you for that. And now you’ve slung your hook from their old Bucket, they’ll have your guts for garters.’

The city had been made unsafe. Saul felt it yawn before him, infinitely vaster than he had imagined, unknowable and furtive.

‘So, so…’ said Saul slowly. So what is London? he thought. If you can be what you are, what’s London? What’s the world? I’ve had it all wrong. Do werewolves and trolls lurk under bridges in the parks? What are the boundaries of the world?

‘So… what do I do now?’

‘Well, you aren’t going back, so you got to bing a waste forward. I’ve to teach you how to be rat. You got a lot going for you, sonny. Hold your breath and squeeze in tight, freeze like a statue… you’re invisible. Move just right, dainty on your toes, you’ll make nary a sound. You can be like me. As far as you’re concerned, up’s no longer out of bounds, and down’s nothing to fear.’

It didn’t matter any more that he didn’t understand. Unbelievably, King Rat’s words took away Saul’s trepidation. He felt himself grow strong. He stretched out his arms. He felt like laughing.

‘I feel like I can do anything,’ he said. He was overwhelmed.

‘You can, my old son. You’re a ratling boy. Just got to learn the tricks. We’ll cut your teeth. You and me together, dynamite. We’ve a kingdom to win back.’

Saul had risen to his feet, was staring out into the street beyond. At King Rat’s words he turned slowly and looked down at the thin figure cocooned in black plastic.

‘Back?’ he said levelly. ‘Back from who?’

King Rat nodded. ‘Time,’ he said, ‘for a word in your shell-like. Much as I hate to piss on your chips, you’re forgetting something. You’re in another country now because your old man did the six-storey swan-dive’ — King Rat blithely ignored Saul’s aghast stare — ‘and he did that, the old codger, in lieu of you. There’s something out there wants your head, chal, and you’d be wise not to forget it.’

Saul wobbled to his knees. ‘Who?’ he whispered.

‘Well now, that’s the biggy, isn’t it? That’s the question. And therein lies a story, a twisting rat-tale.’

Part Two. The New City

Chapter Five

Fabian was trying to call Natasha but he could not reach her. She had taken her phone off the hook. The news about Saul’s father was spreading among his friends like a virus, but Natasha had immunized herself for a little while longer.

It was just after midday. The sun was bright but as cold as snow. The sounds of Ladbroke Grove filtered along the backstreets to the first floor of a flat on Bassett Road. They slid through the windows and rilled the front room, a susurrus of dogs and paper sellers and cars. The sounds were faint; they were what passed for silence in the city.

In the flat a woman stood motionless in front of a keyboard. She was short and her face was severe, with dark eyebrows that met above a scimitar nose. Her long hair was dark, her skin sallow. Her name was Natasha Karadjian.

Natasha stood with her eyes closed and listened to the streets outside. She reached out and pressed the power button on her sampler. There was a static thud as her speakers clicked into life.

She ran her hands over the keys and the cursor. She had stood motionless for a minute or two now. Even alone she felt self-conscious. Natasha rarely let people watch when she created her music. She was afraid they would think her precious, with her silent preparations and her closed eyes.

She tapped out a message on a clutch of small buttons, twisted her cursor, displayed her musical spoils on the LCD display. She scrolled through the selection and plucked a favourite bassline from her digital killing jar. She had snatched it from a forgotten Reggae track, sampled it, preserved it, and now she pulled it out and looped it and gave it another life. The zombie sound travelled the innards of the machine and out through wires, through the vast black stereo against her wall, and burst out of those great speakers.

The sound filled her room.

The bass was trapped. The sample ended just as the bass-player had been about to reach a crescendo, and expectation was audible in the thudding strings as they reached out for something, for a flourish… then a break, and the cycle started again.

This bassline was in purgatory. It burst into existence with a recurring surge of excitement, waiting for a release that never came.

Natasha nodded her head slowly. This was the breakbeat, the rhythm of tortured music. She loved it.

Again her hands moved. A pounding beat joined the bass, cymbals clattering like insects. And the sound looped.

Natasha moved her shoulders to the rhythm. Her eyes were wide as she scanned her kills, her pickled sounds, and she found what she wanted: a snatch of trumpet from Linton Kwesi Johnson, a wail from Tony Rebel, a cry of invitation from Al Green. She dropped them into her tune. They segued smoothly into the rolling bass, the slamming drums.

This was Jungle.

The child of House, the child of Raggamuffin, the child of Dancehall, the apotheosis of black music, the Drum and Bass soundtrack for a London of council estates and dirty walls, black youth and white youth, Armenian girls.