The tale unfolds over a single night as Nina sits at the bedside of her husband, Philip, whose sudden and unexpected death is the reason for her lonely vigil. Still too shocked to grieve, she lets herself remember the defining moments of their long union, beginning with their meeting in Paris. She is an artist, he a highly accomplished mathematician--a collision of two different worlds that merged to form an intricate and passionate love. As we move through select memories, real and imagined, the author reveals the most private intimacies, dark secrets, and overwhelming joys that defined Nina and Philip's life together.