During a picnic at a family farm, sixteen-year-old Laurel Nicholson witnesses a shocking crime—her mother, Dorothy, kills a man. Fifty years later, the story still haunts the heroine. Who was the man and why did her mother do what she did? Laurel feels she may be missing her last chance to learn the truth, and sets out to search Dorothy’s past. She follows the traces of strangers who once met in war-torn London, to understand how their fates are connected to her mother’s fate.