1957, France. 
 
Florence and Lilli meet at finishing school in Lyon. Despite some differences, they forge a firm friendship that promises to last a lifetime. But a terrible betrayal prematurely tears them apart.
 
Years later in England, Florence has become the woman her friend knew she could be – creative, bold, and independent. The exact opposite of Alice, a young woman troubled by a recent trauma, whom Florence is determined to help bring out of her shell. Just as Lilli once did for her.
 
When Florence discovers that the novel she’s reading is written by Lilli and is based on their time at school, the two stories begin to unfold together. Past events illuminate the future, and it becomes clear that long-held secrets can't stay buried for ever.