Church bells chime in an ancient bell tower as architect Jordan Mayfair, from Savannah, Georgia, and her travel-writer uncle, Alexander Carlyle, arrive at Convento di Santa Francesca Firenze in Florence, Italy. Jordan expects the 15th-century convent with its exquisite gardens to offer a safe and serene retreat from the crowded, bustling, touristy district of Europe's premier Renaissance city and anticipates a romantic interlude with Paul Broussard,...