The fragile peace of England is shattered by the machinations of a ruthless queen and the ambitions of a powerful duke. Eleanor of Aquitaine, Queen of England, finds herself in a precarious position as her sons vie for power and her husband, Henry II, struggles to maintain control. The narrative focuses on the escalating conflict between Eleanor and Henry, particularly concerning their sons' claims to the throne and Eleanor's own political maneuvering. The story unfolds against the backdrop of 12th-century England and France, a world of feudal loyalties, dynastic struggles, and the ever-present threat of war.

Falls the Shadow is widely praised for its meticulous historical detail and compelling characterizations, particularly of Eleanor of Aquitaine. Readers and critics alike commend Sharon Kay Penman's ability to bring the tumultuous 12th century to life, immersing the audience in the political intrigues and personal dramas of the Plantagenet court. The novel is noted for its balanced portrayal of complex historical figures, offering insight into their motivations and the forces that shaped their decisions. It stands as a significant work within the historical fiction genre, appreciated for its depth and narrative power.