At 19, Annie Black trades a bleak future in her washed-out hometown for a London winter of drinking to oblivion and yearning for deliverance. Some two decades later, she is married to a good man and settled in San Francisco, with a son and two daughters and a successful career designing artistic interior lights. One June morning, a photograph arrives in her mailbox, igniting an old longing and setting off a chain of events that rock the foundations of her marriage and threaten to overturn her family’s hard-won happiness.