Lumin nods. ‘I – I think I was here once before, when the waterfall was frozen like this.’ She squeezes her eyes shut and crouches down, thinking. Then she looks up at Amber. ‘I think – I think I was watching someone climb it. Is that even possible?’

‘Maybe if you had a pickaxe handy,’ Amber replies.

Lumin closes her eyes again, putting her hand to her temple as she focuses on her memories. ‘Not just one man climbing it, but two. Both with dark hair.’ She opens her eyes again. ‘Dark hair like the man I had a nightmare about.’

Amber goes to Lumin and puts her arm around her shoulders. ‘Don’t dwell on that dream too much. Dreams are weird. I dreamt I married Gordon Brown once.’

But Lumin doesn’t look convinced. And Amber can’t help but wonder if there is some truth in her dream, a memory resurfacing just as one is now.

‘Look, why don’t we take a drive around the loch?’ she says. ‘Let’s try to find the lodge you drew. If the waterfall is real then the lodge must be real too.’

By the time they return to their car, the snow is coming down even harder, quickly blanketing the ground and turning their surroundings into a symphony of white. Lumin looks frustrated, kicking at the snow with the Dr Martens Amber had lent her. Amber feels her frustration too. The more it snows, the more chance their quest will be delayed. But at least they are at the loch now.

‘The hotel I booked for us isn’t far,’ Amber says, opening the car door for Lumin. ‘We’ll circle the loch then head back to the hotel to wait the heavy snow out.’

Lumin nods, quiet.

The car starts, no problem, the snow tyres squeaking over the newly laid snow.

‘Keep your eyes peeled,’ Amber says as they set off around the loch. ‘And shout if you recognise anything.’

But after twenty minutes of driving, they have seen nothing, just more snow and icy trees.

‘There’s nothing like the lodge around here,’ Lumin says, her hands balling in frustration. ‘There’s nothing much at all, really. And the snow’s getting heavier,’ she adds, watching as the windscreen wipers battle to keep up with the snowfall. ‘We should head back before we get stuck.’

Amber wants to say no, that they shouldn’t give up. But she knows Lumin is right. She can feel the car beginning to struggle with the blanket of fresh snow on the ground, even with her special tyres. ‘Maybe you’re right,’ she says.