Sarah's Shadow is the story of Jack Dillon who, as a child in Nineteenth Century Ireland, suffers early tragedy. In spite of this, he flourishes due in large measure to a parish priest, more parent than cleric to him.
As a young man, Jack travels to Boston where he meets and marries the aristocratic Elizabeth Leslie. Together, they move to Chicago where industry is booming. They share great fortune and happiness there.
Their lives, however, take a dramatic turn after they suffer a devastating loss. Jack, unable to deal with it, escapes to a hardscrabble life in the mines of Montana, leaving Elizabeth behind. Many years will pass before Jack discovers that he must confront the emotional damage from his early and later tragedies if he is ever to regain all that is dear to him.