During a picnic on the family farm, sixteen-year-old Lauren Nicholson witnesses a shocking crime - her mother Dorothy murders a man. Fifty years later, this story still bothers the heroine. Who was that person and why did mom do this? Lauren realizes that she may miss her last chance to find out the truth, and begins to look for answers in Dorothy's past. She follows the trail of strangers who once met in war-torn London to understand how their fates are connected with the fate of her mother.