1936. In villages, towns and cities across Scotland, 549 lives are gradually intertwining. People of contrasting backgrounds, ideologies and religions. Spurred on by their burning passion for equality and freedom, they will form the Scottish ranks of the Spanish Civil War's legendary International Brigade. This true story follows four miners from the streets of East Lothian to the valleys of Spain. They gave up everything they knew: for a land they did not know; for a people they had never met; and for a cause they believed was right.