At nineteen, Annie Black abandons California for a London winter of drinking to oblivion and looking for love in the wrong places. Twenty years later, she is a happily married mother of three living in San Francisco. Then one morning, a photograph arrives in her mailbox, and an old obsession is awakened. After a return trip to London, Annie’s marriage falters, her store floods, and her son, Robbie, takes a night-time ride that nearly costs him his life. Now Annie must fight to save her family by untangling the mysteries of that reckless winter in Europe that drew an invisible map of his future.