Set in modern-day Washington, D.C., Requiem for the Devil depicts the end of the Devil's ten-billion-year career. For the first time in his existence, Lucifer falls in love, and this event threatens to transform his identity and perhaps even his destiny. Gianna O'Keefe is the woman who drags him out of his ancient despair and points him toward possible salvation. Yet Lucifer's path from evil is neither straight nor smooth. Pursuing love means betraying his fellow fallen angels, the loyal friends who once followed him to damnation. Divine and infernal forces seem to conspire against his and Gianna's union. Lucifer's empire crumbles around him as he dares to defy the natural order and question his fate.