He will stay like this forever, Robert's arm draped round him. They will be forever twenty. Scotland, 1933.

Bobby MacBryde is off to the Glasgow School of Art. On his first day he will meet another Robert, a quiet man with loose dark curls - and never leave his side. With the world on the brink of war, their unrivalled talent takes them all over Europe, partying, loving, fighting, painting.

The pair become stars as the bombs fall in this stunningly re-imagined true story of devotion and obsession, art and class.