Cape Wrath tells the story of how Bjorn Larssons came to write his dark novel The Celtic Ring about the disappearance of a sailor, arms smuggeling and a secret Druidic cult. On the long sailing trip between Scotland, Wales, Ireland, Brittany and the Spanish coast of Galicia, Larsson talked to many sailors and adventurers, fishermen and seafarers, who were waiting for the next tide to leave port. Their yarns, woven together in Larssons' head, form the backdrop to The Celtic Ring, his thriller about a Celtic secret organisation. Their philosophy, however, is not fiction: Cape Wrath describes a different way of life, a life with the sea, which unites the people of the Celtic fringe of Europe.