On September 11, 2001, Sarah Postle is called to the law offices of Julian Ritteman on the 64th floor in the South Tower of the World Trade Center. During the chaos of evacuation, Mr. Ritteman hands her an envelope and sends her safely home. The next day Sarah opens the envelope and begins a journey that leads her to the doorsteps of Pearl Ritteman in Holland and to the answers to Sarah's mysterious past.