England, 1303. Sir Hugh Corbett is summoned to a scene of bloody mayhem and murder: Wilhelm Von Paulents, a representative of the Hanseatic League,and his wife, son and a clerk have been barbarously assassinated. The "Carta Mysteriosa"--a collection of valuable and detailed maps and sea chart--have not been stolen. So why were the murders committed and by whom? Corbett investigates and, once again, he enters the world of shadows to confront the Seed...