When notary Lebel sits down with Jeanne and Simon Marwan to read them their mother Nawal's will, the twins are stunned to receive a pair of envelopes - one for the father they thought was dead and another for a brother they didn't know existed. In this enigmatic inheritance, Jeanne sees the key to Nawal's retreat into unexpected silence during the final weeks of her life. She immediately decides to go to the Middle East to dig into a family history of which she knows next to nothing. Simon is unmoved by the posthumous mind games of a mother who always distant and cold. However, the love he has for his sister is strong, and he soon joins her in combing their ancestral homeland in search of a Nawal who is very different from the mother they knew. With Lebel's help, the twins piece together the story of the woman who brought them into the world, discovering a tragic fate forever marked by war and hatred as well as the courage of an exceptional woman.