An interest in ancient stone circles keeps James, a financial trader in the city of London, well-grounded. When visiting a little-known stone circle in North Wales, on the summer solstice, he is transported back to the time of the circle's construction. James lives among the Late Bronze Age villagers, befriending the architect of the stone circle, Barnaby, and a young widow called Eira. James rejoins the present, quickly realising he was...