Featuring Tilda Swinton as the voice of Scottish painter Wilhelmina Barns-Graham, the film tells the story of a remarkable artist and a magnificent obsession. One day in 1949, a young Scottish painter climbed a Swiss glacier. The experience rewired her brain and transformed her art. Through a cinematic immersion into her art and life, the film explores themes of gender, neurodiversity, climate change, and the nature of creativity.