Then all of them had left, once the trouble hit. They’d gone home to be with their families, believing love could save them. “You go ahead, I’ll lock up,” Toby had told them. And she had locked up, but with herself inside.

She scrubs her long dark hair, twists it into a wet bun. She really must cut it. It’s thick and too hot. Also it smells of mutton.

As she’s drying her hair she hears an odd sound. She goes cautiously to the rooftop railing. Three huge pigs are nosing around the swimming pool – two sows and a boar. The morning light shines on their plump pinky-grey forms; they glisten like wrestlers. They seem too large and bulbous to be normal. She’s spotted pigs like this before, in the meadow, but they’ve never come this close. Escapees, they must be, from some experimental farm or other.

They’re grouped by the shallow end of the pool, gazing at it as if in thought, their snouts twitching. Maybe they’re sniffing the dead rakunk floating on the surface of the scummy water. Will they try to retrieve it? They grunt softly to one another, then back away: the thing must be too putrid even for them. They pause for a final sniff, then trot around the corner of the building.

Toby follows the railing, tracking them. They’ve found the garden fence, they’re looking in. Then one of them begins to dig. They’ll tunnel under.

“Get away from there!” Toby shouts at them. They peer up at her, dismiss her.

She scrambles down the stairs as fast as she can without slipping. Idiot! She should keep the rifle with her at all times. She grabs it from her bedside, hurries back up to the roof. She holds one of the pigs in the scope – the boar, an easy shot, he’s sideways – but then she hesitates. They’re God’s Creatures. Never kill without just cause, said Adam One.

“I’m warning you!” she yells. Amazingly they seem to understand her. They must’ve seen a weapon before – a spraygun, a stun gun. They squeal in alarm, then turn and run.

They’re a quarter of the way across the meadow when it occurs to her they’ll be back. They’ll dig under at night and root up her garden in no time flat, and that will be the end of her long-term food supply. She’ll have to shoot them, it’s self-defence. She squeezes off a round, misses, tries again. The boar falls down. The two sows keep running. Only when they’ve reached the forest rim do they turn and look back. Then they meld with the foliage and are gone.

Toby’s hands are shaking. You’ve snuffed a life, she tells herself. You’ve acted rashly and from anger. You ought to feel guilty. Still, she thinks of going out with one of the kitchen knives and sawing off a ham. She’d taken the Vegivows when she joined the Gardeners, but the prospect of a bacon sandwich is a great temptation right now. She resists it, however: animal protein should be the last resort.

She murmurs the standard Gardener words of apology, though she doesn’t feel apologetic. Or not apologetic enough.

She needs to do some target practice. Shooting the boar, missing at first, letting the sows get away – that was clumsy.

In recent weeks she’s grown lax about the rifle. Now she vows to cart it around with her wherever she goes – even up to the rooftop for a bath, even to the toilet. Even to the garden – especially to the garden. Pigs are smart, they’ll keep her in mind, they won’t forgive her. Should she lock the door when she goes out? What if she has to run back into the Spa building in a hurry? But if she leaves the door unlocked, someone or something could slip in when she’s working in the garden and be waiting for her inside.

She’ll need to think of every angle. An Ararat without a wall isn’t an Ararat at all, as the Gardener children used to chant. A wall that cannot be defended is no sooner built than ended. The Gardeners loved their instructive rhymes.

Toby went in search of the rifle a few days after the first outbreaks. It was the night after the girls had fled from AnooYoo, leaving their pink smocks behind them.

This was not an ordinary pandemic: it wouldn’t be contained after a few hundred thousand deaths, then obliterated with biotools and bleach. This was the Waterless Flood the Gardeners so often had warned about. It had all the signs: it travelled through the air as if on wings, it burned through cities like fire, spreading germ-ridden mobs, terror, and butchery. The lights were going out everywhere, the news was sporadic: systems were failing as their keepers died. It looked like total breakdown, which was why she’d needed the rifle. Rifles were illegal and getting caught with one would have been fatal a week earlier, but now such laws were no longer a factor.

The trip would be dangerous. She’d have to walk to her old pleeb – no transport would be functioning – and locate the tacky little split-level that had so briefly belonged to her parents. Then she’d have to dig the rifle up from where it had been buried, hoping no one would see her doing it.

Walking that far would be no problem: she’d kept herself in shape. The hazard would be other people. The rioting was everywhere, according to what fitful news she could still pick up from her phone.

She left the Spa at dusk, locking the door behind her. She crossed the wide lawns and made her way to the northern entrance along the woodland walk where the customers used to take their shady strolls: she’d be less visible there. There were still some glowlights marking the pathway. She met no one, though a green rabbit hopped into the bushes and a bobkitten crossed in front of her, turning to stare with its lambent eyes.

The entrance gate was ajar. She slid through cautiously, half expecting a challenge. Then she set out across Heritage Park. People were hurrying past, singly and in groups, trying to get out of the city, hoping to make their way through the pleebland sprawl and seek out refuge in the countryside. There was coughing, a child’s wail. She almost stumbled over someone on the ground.

By the time she reached the Park’s outer edge, it was pitch-dark. She moved from tree to tree along the verge, hugging the shadows. The boulevard was jammed with cars, trucks, solarbikes, and buses, their drivers honking and shouting. Some of the vehicles had been overturned and were burning. In the shops, the looting was in full swing. There were no CorpSeCorpsMen in sight. They must have been the first to desert, heading for their gated Corporation strongholds to save their skins, and carrying – Toby certainly hoped – the lethal virus with them.

From somewhere there were gunshots. So backyards were already being dug up, thought Toby: hers was not the only rifle.

Up the street there was a barricade, cars wedged together. It had its defenders, armed with what? As far as Toby could see they were using metal pipes. The crowd was screaming at them in fury, throwing bricks and stones: they wanted past, they wanted to flee the city. What did the barricade-holders want? Plunder, no doubt. Rape and money, and other useless things.

When the Waterless Waters rise, Adam One used to say, the people will try to save themselves from drowning. They will clutch at any straw. Be sure you are not that straw, my Friends, for if you are clutched or even touched, you too will drown.

Toby turned away from the barricade – she’d have to circle around it. She held herself back in the darkness, crouching along behind the foliage and skirting the Park’s rim. Now she’d reached the open space where the Gardeners used to hold their markets, and the cobb house where the kids once played. She hid behind it, waiting for a distraction. Soon enough there was a crash and an explosion, and while all heads were turned she ambled across. It’s best not to run, Zeb had taught: running away makes you a prey.

The side streets were awash with people; she dodged to avoid them. She’d worn surgical gloves, a bulletproof vest made of silk from a spider/goat splice lifted from the AnooYoo guardhouse a year ago, and a black nose-cone air filter. From the garden shed she’d brought a shovel and a crowbar, both of which could be lethal if used decisively. In her pocket was a bottle of AnooYoo Total Shine Hairspray, an effective weapon if aimed at the eyes. She’d learned a lot of things from Zeb in his Urban Bloodshed Limitation classes: in Zeb’s view, the first bloodshed to be limited should be your own.