AI Herrera went out the fire door of the Raven's Nest with his medical bag swinging, and Quinn was six seconds behind him.
Six seconds. She'd counted them the way she counted everything, because counting kept the panic where it belonged, filed under later. The green neon of the bar's sign smeared across wet brick as she came through the door sideways, shoulder first, and her boots found a puddle of dishwater and something worse.
"Herrera! Police!"
He didn't stop. Nobody ever stopped. Eighteen years and she could count on one hand the ones who'd stood there politely with their hands raised, and three of those had been drunk.
She ran.
Soho spat them out onto Charing Cross Road, Friday-night crowds thick as porridge, umbrellas going up and down like a bad orchestra. Rain hammered the pavement into a hiss. Herrera moved well for a man carrying a bag, weaving between a hen party and a bus queue, one hand pressed flat to his chest, and she knew from the file what he kept under his shirt. Saint Christopher. Patron saint of travellers.
Run all you like, she thought. Christopher doesn't cover this.
He glanced back at Cambridge Circus. Just once. Warm brown eyes, wide as a horse's in a house fire, and there was blood on his forearm, sheeting over the old knife scar, thin and pink where the rain had got at it.
Not his blood. She'd bet her pension.
"Tomás!" She used the first name because names slow people down. "Whoever they are, they need a hospital, not you!"
"No." He shouted it over his shoulder, breathless, half laughing. "No, they very much do not."
Then he cut left, and she lost eleven seconds to a taxi that decided it owned the crossing.
Northern line, she thought. He's going for the Northern line.
He didn't. He went for the buses, then a service alley behind a Korean restaurant, then a flight of steps she hadn't known existed in twenty years of walking this city. The alley stank of frying oil and old rain. Bin bags shone black under a security light. She took the steps three at a time, felt the old ache in her right knee register a complaint, and filed that under later as well.
Radio in her hand. Thumb on the button.
She didn't press it.
Later, she'd wonder about that, and she'd lie to herself about the reason. The truth sat there anyway, patient. Three years ago she'd called it in. Three years ago she'd done everything by the book, all the correct words in all the correct order, and the book had given her back a coroner's report that said DS Alan Morris had died of exsanguination from wounds consistent with an animal attack, in a corridor in Bermondsey with no animals in it, and no blood on the floor.
None. Not a drop. Nine pints of a man gone, and the lino wiped clean.
So she didn't press the button. She kept running.
North. Always north. Camden by the time her lungs started charging interest, the canal on her left throwing back streetlight in broken yellow ribbons, the lock gates dripping. The market stalls were shut, plastic sheeting lashed down over knock-off leather. A man asleep in a doorway under a duvet that had once been white. Somewhere a saxophone, badly played.
Herrera turned into Kentish Town Road, then into a gap between a shuttered kebab shop and a bookmaker's, and vanished.
Quinn stopped. Breathed. Made herself look .
Hoarding. Blue, ten feet high, plastered with fly posters for club nights that had happened last year. A padlock hung open on a hasp. Behind it, a stair going down into the dark, tiled in that particular ox-blood red the Underground used before the war, and a gust of air came up out of it that had no business smelling the way it did. Warm. Sweet. Like burnt sugar and wet pennies.
She'd walked past this hoarding a hundred times. Camden Town station was four hundred yards that way. This was nothing. A hole. A gap in the paperwork of the city.
Her torch found the steps. Twelve down, then a turn.
At the turn, a bone lay on the tile.
She crouched. Not a bone, quite. A token, palm-sized, ivory-yellow, drilled through at one end and carved with a spiral that made her eyes water if she looked at the centre of it. Warm. Warmer than her hand.
Careless of him, she thought, and then, immediately: no. Not careless. He'd checked his chest twice while he ran. He'd looked back at Cambridge Circus.
An invitation, then. Or a hook, baited.
Quinn had eighteen years of decorated service, a sharp jaw, a worn leather watch on her left wrist that she wound every night at ten because Morris had once mocked her for it, and absolutely no jurisdiction down that staircase. She knew it the way you know a room is about to go off. Everything below this turning belonged to somebody else, and whatever rules applied there had never passed through Parliament.
She thought about the blood on Herrera's arm.
She thought about a clean floor in Bermondsey.
Then she stood, put the token in her coat pocket, and went down.
The stairs ran longer than they should. Forty-one steps, then a passage where the tiles gave out and became bare brick, and then the brick gave out and became something that had been sprayed on decades ago and was now furred with pale growth. Her torch beam started behaving oddly, going soft at the edges, as if the dark were thicker than dark.
Sound arrived before light. Voices, dozens, in a low churning babble, and under it a drone she felt in her teeth.
The passage opened.
She had expected a tunnel. She got a cathedral of a place, an old station platform stripped of its trains and packed to the vaulted ceiling with stalls, awnings, ropes of hanging lanterns that burned green and gold with nothing in them she could name. Two levels, iron stairs bolted crooked between them. The rails were gone ; the track bed had become an aisle, and the aisle was full.
Full of people. Mostly.
A woman in a butcher's apron sold hands. Human hands, or good copies, laid on ice in rows, each one wearing a paper label. A boy with skin like birch bark poured something from a jug into a customer's cupped palms, and the customer drank from their hands and wept. Three figures in identical grey suits stood absolutely motionless around a case of eyeglasses. Somebody was hawking bottled sleep at eight hours for forty pounds, no refunds, no dreams guaranteed.
Copper stung her nostrils. Blood, recent, and burnt sugar over the top of it like icing on a bad cake.
Quinn kept her hands out of her pockets and walked in.
Nobody looked at her. That was the wrong thing, and she clocked it at once. Walk into any pub, any estate stairwell, any market in this city with a warrant card in your coat and heads turn. Here, heads did not turn. Here, heads stayed carefully , deliberately , unanimously pointed at their own business.
Which meant they'd already decided what she was.
She found Herrera's medical bag on a table forty feet in, abandoned between a tray of teeth and a stack of small cages.
She found the rest a second later.
On the same table, on a square of black velvet , next to a price tag written in a neat copperplate hand: a warrant card in a leather wallet, worn soft at the fold. Metropolitan Police. The photograph showed a heavy-jawed man who'd never once been photographed well, and the name printed beside it was MORRIS, ALAN J., DETECTIVE SERGEANT.
The lanterns went out. All of them. Together.
And in the black, close enough that the breath moved the hair at her ear, something with far too many consonants said, "Detective Quinn. You're late. He's been waiting three years."