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Caroline wakes up in a Parisian hospital with no memory of her past and is surprised to discover that she has lived an unexciting life in a spacious apartment on the banks of the Seine. Her memory slowly returns, but she cannot shake the feeling that she is in danger. In one of the cupboards, Caroline finds letters from a woman from the terrible year 1943. Their author, Céline, is a young widow living in Nazi-occupied Paris. These letters tell the story of her difficult life, full of fear of death, the story of the choice Céline once made to save the most precious person in her life.

Aware of the pain of others, will Caroline be able to recover her own memories and understand that she and Céline have more in common than she could have ever imagined...