The setting is England after the Romans have left, and after the conquests of KingArthur and his Knights of Camelot. As our protagonists travel the land in search of their lost son, they encounter various characters, some amicable, some unpredictable, as cultural consequences of both the Roman conquests and the Arthurian wars that aimed to bring various factions, Britons and Saxons, warriors and clerics, myths and realities, under a common flag.
These are parallel journeys of remembrance, the personal story for each of the character, each on a quest to perfect or pursue his/her aim in life, to lift the fog of forgetfulness, to see the land and its inhabitants in a clear light, to right the wrong according to personal code, regardless of personal consequences. Each encounter reveals the status of institutions, and the connections each character has had to the same. These understandings reveal the ultimate dilemma: to remember is both a way to be cleansed of the fog, revel in the joy of lost memories, and a way to be hurt again, as the hurts that have been buried deep in one's psyche, deeply concealed, the way the buried giant conceals all the bones of those who were atrociously cut down in their prime because of King Arthur and his knights' crusades or some other national atrocity committed for a cause that was sold as good for all.
What an apt bedtime story of us old folks.