Book sounds much more interesting. This movie was obviously meant to be "art house" but I would have been grateful for some more explanation as to what the hell was going on! lol. I think you're on the right lines as to what the black water was supposed to represent but it would have made more sense for them to have been beamed up in a spaceship or something like instead of taken to a derelict house in the middle of nowhere with enormous black rooms filled with water. It was just such a contrast from the very real and gritty streets of Glasgow to places that physically wouldn't be possible. Too weird and frustrating for me sorry. Fans of the book must have been quite disappointed.

Thanks for all the info ;)