Nicholas Rohloffsen is ashamed of himself. Although he was doggedly loyal to his wife until her death nine weeks earlier, he cannot stop thinking about Margot Renard, the much older woman who possessed his heart when he was a younger man. Nicholas's quest to find her soon leads him to a retirement home where he proclaims he is the distant cousin of the recently deceased composer, Victor Rohloffsen, and is searching for more information about his past relationship with Margot. But his reason for visiting is barely true, if true at all. As he sets out to prove that a widowed resident, Katherine Anne Kendall, is really Margot, Nicholas is led down an unexpected path where he finally learns the fascinating truth about why she once suffered, how she somehow found refuge from her pain through furious play and study of classical piano, and why some casualties of the war were not on the front lines. Margot's War reveals a widower's journey back into the past as he searches for the woman who once captured his heart and, in the process, uncovers a complex chain of events that reveal the truth.