981 AD. The Viking King of Dublin is dead. His young widow, Gormflaith, has ambitions for her son--and herself--but Ireland is a dangerous place and kings tend not to stay kings for long. Gormflaith also has a secret. She is one of the Fomorians, an immortal race who can do fire-magic. She has kept her powers hidden at all costs, for there are other immortals in this world--like the Tuatha Ď Danann, a race of warriors who are sworn to kill Fomorians....