The Last Light of the Sun takes place in the Dark Ages of a parallel world. The Erlings (Vikings) raid the Cyngael (Welsh) and Anglcyn (Anglo-Saxon). A young Erling flees indentured servitude and becomes a raider, following in the footsteps of his estranged father. A Cyngael prince dies in an Erling raid and is taken by the Queen of the Fairies; his brother is drawn to another fairy; he will enter into a reluctant compact with the Anglcyn when they are raided by the Erling.
Kay is an elegant and subtle writer. The principal characters are well-drawn and complex, struggling with their intersecting destinies.