'Action packed and panoramic.' Guardian 1956, the Scottish Highlands: Aaron and Robbie, a schoolmaster's son and a farmer's boy, are fast friends with a shared passion for diving, but very divergent ideas of what they will do with their lives. Meanwhile, Mark and Ally, bright pupils at Edinburgh's grandest private school, are aspiring to make change in the world - one through high finance, the other on the political stage. And Joseph, heir to an Aberdeen trawler-fishing dynasty, is brooding over whether his true ambitions are set higher than his father's succession plan.