While doing graduate work in Celtic studies at Oxford Lewis Gillies goes off in search of his roommate, Simon, who fell through a cairn into the land of the Tuatha de Danann, and finds himself playing roles within important Celtic mythology.
The Supreme Anarchists Council is dedicated to overthrowing the world order. To keep their identities a secret, each of the members has been named after a day of the week. Gabriel Syme, an eccentric poet, is recruited by Scotland Yard to infiltrate the group. He tracks down the six other men and manages to win a place on the council. But after a bizarre twist of events, Syme quickly realizes that appearances are never what they seem in the dangerous world of the political underground.
