Faded photographs of a glamorous couple in postwar Europe. Old letters hinting of tragic loss. And a breathtaking array of magnificent jewelry, spectacular stones in exquisite settings. These are the contents of a safe-deposit box long abandoned in a New York City bank. If no heir can be identified, the jewelry will be auctioned. But who was the woman who left such a fortune and no will?

As the war rages on in the summer of 1943, causing massive destruction and widespread fear, the King and Queen choose to quietly send their youngest daughter, Princess Charlotte, to live with a trusted noble family in the country. Despite her fiery, headstrong nature, the princess' fragile health poses far too great a risk for her to remain in war-torn London.

Ginny Carter was once a rising star in TV news, married to a top anchorman, with a three-year-old son and a full and happy life in Beverly Hills - until her whole world dissolved in a single instant on the freeway two days before Christmas. In the aftermath, she pieces her life back together and tries to find meaning in her existence as a human rights worker in the worst areas around the globe.

Kait Whittier has built her magazine column into a hugely respected read followed by fans across the country. She loves her work and adores her grown children, treasuring the time they spend together. But after two marriages she prefers to avoid the complications and uncertainties of a new love. Then, after a chance meeting with Zack Winter, a television producer visiting Manhattan from Los Angeles, everything changes.

On a beautiful May morning at New York's John F. Kennedy airport, two planes have just departed for San Francisco - one a 757, another a smaller Airbus A321. At a security checkpoint, TSA agent Bernice Adams finds a postcard of the Golden Gate Bridge bearing an ambiguous - perhaps ominous - message. Her supervisor dismisses her concerns, but Bernice calls security, and soon Ben Waterman arrives. A senior Homeland Security agent, Ben too becomes suspicious. Who left the postcard behind, which flight is that person on, and what exactly does the message mean?