Byrne tells the astonishing story of an Irish artist who, in the early years of this century, goes rapidly to the bad, bedding and abandoning women everywhere, debasing his talents as a composer and painter, and finally ending up within Hitler's Third Reich, at which point he vanishes. After his disappearance, the story passes to his twin sons, one a doubting priest, the other suffering from a debilitating disease, who move across the troubled face of contemporary Europe before encountering their father in one final apocalyptic confrontation.