In the small hours of January 1st, 1919, the cruellest twist of fate changed at a stroke the lives of an entire community. Tormod Morrison was there that terrible night. He was on board HMY Iolaire when it smashed into rocks and sank, killing some 200 servicemen on the very last leg of their long journey home from war. For Tormod - a man unlike others, with artistry in his fingertips - the disaster would mark him indelibly. Two decades later, Alasdair and Rachel are sent to the windswept Isle of Lewis to live with Tormod in his traditional blackhouse home, a world away from the Glasgow of their earliest years.