Freediver Johanna Nordblad first took to cold water as a cure for pain after a severe injury. This month she attempts to break the world record for swimming beneath ice

Evening is falling and the cold winter light is bleeding out of a steel-coloured sky. Soon the short Scandinavian afternoon will give way to night here on the edge of Lake Sonnanen in the south of Finland. Not a single gust of wind moves the pine branches; not a single ripple disturbs the water’s surface. Nothing disturbs this infinite expanse of trees, ice and snow enveloped by absolute silence.

It’s here, in a simple hunter’s lodge 170km northeast of Helsinki, that freediver Johanna Nordblad and her sister and personal photographer, Elina, spend most of their free time. With urban rhythms left far behind, their days are occupied by shovelling snow, gathering firewood and spending long hours after dinner chatting by candlelight.