I dive in, immediately nervous, thinking of doing a hard turn back, but I force myself to drift, my nose just out of the water, and look down at my feet dangling into the murk. It is thick with sediment, shafts of light trying to break through and failing in the deep, deep brown.

White smudged lines appear, a birch tree that fell into the water last year, a nightmare place made worse by the fish that drift past. I pull my feet up and clamber onto the raft, and I am on it and then I’m not. It sinks and then shoots out to the side, breaking the surface like a shark, leaving me to sink back into that awful abyss.