An hour later Konrad and Petra appeared in the doorway.

‘Are we ready to go now?’ asked Petra.

‘Not quite yet. There’s one more thing we need to work out.’ Patrik wasn’t sure how to explain. So much was still murky and hazy.

‘And what’s that?’ Petra frowned. She clearly didn’t want to waste any more time.

‘Let’s meet in the kitchen.’ Patrik got up and went to summon the others. After hesitating for a moment, he also knocked on Mellberg’s door.

When everyone had gathered, Patrik introduced Petra and Konrad. Then he cleared his throat and slowly began explaining his theory, careful to include those areas that still had major holes. When he was finished, everyone sat in silence for a moment.

‘What would be the motive?’ asked Konrad. He sounded both hopeful and sceptical.

‘I don’t know. That’s what we still have to work out. But the theory holds up, even though there are some gaps that have to be filled in.’

‘How should we proceed?’ asked Paula.

‘I’ve talked to Torbjörn and told him that we’d be sending over a new fingerprint ASAP, so he can compare it with the prints on the door and the paper bag. If it matches, everything else will be easier. Then we’ll have a link to the murder.’

‘The murders,’ said Petra. She looked dubious but at the same time slightly impressed.

‘Who’s going with us?’ asked Konrad, looking at the others. He was starting to get up, as if to head out the door at once.

‘I’ll go with the two of you. That should be plenty,’ said Patrik. ‘Everyone else will keep working on the new leads.’

The minute they stepped out into the sunshine, Patrik’s mobile rang. When he saw that it was his mother calling him, he didn’t want to answer, but finally he decided to take the call. Impatiently he listened to his mother pouring out her worries. She couldn’t get hold of Erica even though she’d tried ringing her mobile several times. When she told Patrik where Erica had gone, he stopped abruptly. Without saying goodbye, he ended the phone call and turned to Petra and Konrad.

‘We have to go. Now.’

Erica opened the door and nearly toppled over backwards. She almost threw up, and she realized that she was right. It was the smell of a corpse. A suffocating and deeply disturbing stench that was impossible to mistake for anything else once you’d smelled it. She stepped inside, holding her arm over her nose and mouth as she tried to shut out the smell. But it was impossible. It was so penetrating, seeming to seep into every pore, just as it had clung to Nathalie’s clothes.

She looked around, her eyes filling with tears from the stench. Cautiously she took a few more steps inside the small house. Everything was quiet and peaceful. Only the distant sound of the sea could be heard. Nausea threatened to overwhelm her, but she fought off the urge to escape into the fresh air.

From where she stood, she could survey the entire ground floor. There were only ordinary things to see. A sweater hanging over the back of a chair, a coffee cup on the table next to an open book. Nothing that could explain the cloying, disgusting smell that hovered like a blanket over everything.

One door was closed. Erica dreaded opening that door, but now that she’d come this far, she knew that she had to do it. Her hands shook and her legs suddenly felt like jelly. She wanted to turn around and run out the front door to the boat and go home. Home to the fragrant scent of her babies’ hair. But she moved closer. She saw her trembling right hand reach out and take hold of the door handle. Still she hesitated to press it down, didn’t dare see what was inside that room.

A sudden gust of wind on her legs made her turn around. But it was too late. Suddenly everything went black.

The guests of honour who had come from further away were chattering happily as they disembarked from the buses arriving from Göteborg. Sparkling wine had been served during the drive to Fjällbacka, with the result that everyone was now in a glorious mood.

‘It’s going to be great.’ Anders put his arm around his sister’s shoulders as they waited to welcome the guests.

Vivianne smiled joylessly. This was the beginning, but it was also the end. And she was unable to enjoy the present moment when it was only the future that mattered. A future that no longer felt as certain as it once had.

She studied her brother’s profile as he stood in the open doorway of Badis. There was something different about him. She’d always been able to read him like an open book, but now he’d retreated to a place where she was unable to reach him.

‘What a splendid day, my darling.’ Erling kissed her on the lips. He looked rested. Yesterday she had given him the sleeping tablet at seven o’clock, so he’d slept for thirteen hours straight. Now he was practically bounding around in his white suit. After giving her another kiss, he hurried off.

The guests began entering the building.

‘Welcome. I hope you have a pleasant stay at Badis.’ Vivianne shook hands, smiling and repeating her words of welcome again and again. She looked as if she’d stepped out of a fairytale, wearing a white, ankle-length gown, and with her thick hair hanging in a plait down her back, as usual.

When everyone had gone inside, and she and Anders were alone for a moment, her smile faded and her expression grew serious. She turned to face her brother.

‘We always tell each other everything, don’t we?’ she said in a low voice. She ached with longing to hear him say what she wanted to hear. She truly wanted to believe him. But Anders looked away, and didn’t say a word.

Vivianne was about to ask him again, but a late-arriving guest was approaching the entrance, so she plastered on her warmest smile. Inside, she felt ice-cold.

‘Why did your wife go out there?’ asked Petra.

Patrik was driving to Fjällbacka as fast as he dared. He explained about the books that Erica wrote and told them that lately she had started researching Gråskär, just for her own amusement.

‘She probably wanted to show Nathalie what she’d found.’

‘There’s no reason to think that she’s in any danger,’ said Konrad, sitting in the back seat and trying to reassure Patrik.

‘No, I realize that,’ said Patrik. At the same time he had a feeling that he needed to get out to Gråskär as fast as possible. He had phoned Peter, who promised to have the Coast Guard vessel ready when they arrived.

‘I’m still wondering what the motive could be,’ said Konrad.

‘Hopefully we’ll find out soon – if Patrik is right, that is.’ Petra didn’t sound completely convinced.

‘So you’re saying that, according to a witness, Mats Sverin had a woman in the car with him when he came home on the night he was shot? How reliable is the witness?’ Konrad leaned forward to stick his head between the front seats. Outside the car windows, the countryside was passing by at breakneck speed, but neither Petra nor Konrad seemed particularly concerned.

Patrik considered how much he should tell them. The truth was that Old Man Grip was not the most reliable of witnesses. For a start, he claimed that it was his cat who had seen the woman. That was the first thing that had occurred to Patrik when he heard that the bullets matched. In Martin’s report, it said that the cat was sitting in the window, hissing at the car, and a few lines above it said: ‘Marilyn doesn’t like women. She hisses at them.’ Martin hadn’t noticed the connection, and Patrik hadn’t either when he first read the report. But combined with the other details that had emerged, it was enough for Patrik to send Martin back to have another talk with Grip. This time he managed to get the man to admit that a woman was seen getting out of the car that had stopped in front of the block of flats in the early hours of Saturday. After hesitating a bit, he had also confirmed that it was Sverin’s car. Unfortunately, Grip continued to insist that it was his cat who had seen all of this. Patrik decided to omit this last detail for the time being.