That day Angie had seemed like a complete stranger. But Diane had been setting eyes on her for the first time since she was fourteen. Her teenage illusions were easily shattered.

They’d spent a lot of time together since then and Angie had even stayed with her for a while in her flat in Edendale. Yet it was odd to look at her now and notice that she was starting to look middle-aged. Her eyes were tired and the lines around her temples, formed by years of pain, seemed more deeply etched.

And surely Angie had put on weight too? It was something Diane herself had never been able to do. Food just didn’t hold the same attraction for her that it did for other people. It was necessary fuel, but not a subject for lengthy conversation, let alone something to write stacks of books or produce endless TV shows about. So she eyed Angie’s outline with interest and examined her arms, no longer so thin that they looked as though they would snap. Her sister had always been slim. Since Diane had tried to emulate her in every way when they were teenagers, it seemed wrong that Angie could now so easily abandon her function as a role model.

They ordered straight away, because Angie was keen to eat. Diane chose a pasta pomodoro, a penne pasta with tomato sauce, sun-dried tomatoes and basil.

‘I suppose that’s the lowest calorie dish on the menu,’ said Angie.

‘It might be,’ said Diane, though she knew perfectly well it was.

Angie laughed. She seemed much more relaxed than her sister had ever seen her before. It was odd and she didn’t quite know what to make of it.

Their food came quickly. Diane watched her sister eating skewered chicken breast pieces with peppers and barbecue sauce.

‘Things are going well, then?’ she said.

‘Great.’ Angie looked up from her chicken skewers. ‘I told you I’ve got a new bloke, didn’t I?’

‘I believe you mentioned it in your texts. Several times.’

‘We’ve been an item for a few months now.’

‘I’m happy for you.’

Angie smiled. It was a curiously smug expression, more like a smirk. Diane immediately became suspicious.

‘What’s going on?’ she said.

‘What do you mean?’

‘Come off it. I know you too well.’

But Angie shrugged. ‘Stop being a copper.’

‘Mmm.’

They ate silently for a moment, allowing the background noise of the students to wash over them.

‘Speaking of which,’ said Angie, ‘how’s the lovely Ben?’

‘What?’

‘Don’t pretend you don’t know who I mean.’

‘Ben Cooper?’

‘Of course.’

‘He’s all right, I suppose.’

Angie nodded. ‘He’s got over all that business with the fire and his fiancée being killed? I mean, it’s a while ago now, isn’t it? People do get over these things and move on with their lives.’

‘Obviously.’

Diane didn’t like the way the conversation was going. Angie had always shown an inexplicable interest in Ben Cooper. But she had her own bloke now. They’d been an item for months and it sounded serious. Why was she still talking about Cooper?

‘So,’ said Angie, ‘he’s, you know … available again.’

‘Well, I guess so. But I thought you were happy with your new bloke.’

Angie gaped at her and dropped her fork on to her plate with a clatter. She threw her head back and laughed. She had a peculiar, hiccuping laugh that always made heads turn in astonishment. Diane cringed with embarrassment and tried to turn away from the gawping faces in the bar.

‘Diane, you idiot,’ said Angie, when she’d taken a drink to stop herself choking.

‘What on earth is the matter with you?’ said Diane.

‘Never mind. How’s the pasta?’

‘Fine.’

When they’d finished their meal, they sat for a long time over their drinks. Finally, Angie put down her glass with a decisive air.

‘So,’ she said.

‘What?’

‘I have something to tell you.’

Diane’s heart sank. She’d only ever heard bad news from her sister. Or so it seemed when she looked back over the years.

‘What is it, sis?’

‘You know I was saying about this bloke? His name’s Craig, by the way.’

‘I think I remember.’

‘No, you don’t.’

‘Well…’

‘It doesn’t matter. Anyway, what I’m trying to tell you is this. We’ve been together for a while and we decided that … well, the fact is, Di – I’m pregnant.’

Ben Cooper had decided not to go straight back to his car after he left the shop, but headed away from the market square. Though it was right in the centre of Edendale, this stretch of the River Eden was a peaceful spot, particularly at night. It was only a few yards from the shopping centre, but it always felt to Cooper as though he’d stepped out of the town into a different world once he turned the corner and stepped down on to the riverbank.

In the darkness he could see only a few flickers of light off the water as it foamed over the weir. But he could hear the sounds. The soothing whisper and murmur of the river was enough to calm him down and let him think quietly to himself.

He was aware of the mallard ducks who lived on the river here. They were floating out there somewhere on the water near the weir, apparently asleep, with their beaks tucked under their wings. But he knew their feet must still be paddling like mad below the surface to keep them in position, or they would be swept downstream by the current.

Cooper sat on a bench for a while, enjoying the quiet and the chance to think. It wasn’t the Sandra Blair inquiry that was bothering him. The solution to that would surely turn out to be something perfectly ordinary and sordid. Almost predictable, in fact.

It wasn’t even Dorothy Shelley he was worried about. He’d phoned the hospital earlier in the evening to check on her condition and had been told she was ‘comfortable’. He knew from experience that it was what they said when there was no hope of recovery. But her family were at her side and it wasn’t his place to intrude. There was nothing more he could do.

No, it was Diane Fry’s behaviour that baffled him. He’d tried to make friends with her when she’d first come to Derbyshire, but he’d failed. He’d tried to understand her, hoping she would relax a little and open up. But in the past she’d hardly noticed his attempts at empathy. She’d simply passed him by, as if he were no more than a piece of furniture. But then, she behaved the same way with everyone else, didn’t she?

Yes, Fry’s lack of empathy was legendary. He’d been reminded of it by one moment during Liz’s funeral. In fact, he’d seen it at almost every funeral he’d ever been to. If you looked behind the church or crematorium, you’d sometimes see the drivers of the hearse and the funeral cars laughing and smoking among themselves during the service.

Well, the undertakers didn’t really care that your fiancée had died. They attended two or three funerals every day and they couldn’t be prostrated by grief every time, especially for people they didn’t know. But for a while Cooper found it hard to understand how people could do the job at all. How did you spend time with a crowd of people who were grief stricken and not share their emotions? How could you go to funeral after funeral, every day of the week, all the year round, and not be affected by it? It needed a particular type of person to spend their life dealing with death, thinking about death, and meeting those who’d just been bereaved, and yet be able to chat and joke with their friends as if they didn’t have a care in the world.

After Liz’s funeral he’d come away with the conviction that people who did the job must be sociopaths. Only a serious personality disorder would enable you to look so solemn while you carried a coffin, then take off your tie, go home and eat dinner, watch the TV, and tell the wife you’d had a good day at work.

In fact, he’d envied those people. For a long time, he wished he could be like them. But he knew he would fail.