In 1915, farmer and amateur archaeologist Robert Thomson disappeared from Scotland's Orkney Islands with a priceless Stone Age artifact. A century later, his great-great-grandson, Pete Ferguson, is coming to Scotland with boyfriend Jamie Brodie to meet his distant cousins and investigate Robert's disappearance. But the homophobia of the Thomson patriarch threatens to derail their quest - and a chance meeting in a pub in Oxford brings Pete and Jamie's relationship to a turning point.