Berlin 2014. The 25th anniversary of the fall of the Wall, and the city is gearing up for a celebration of unity and liberation. But, beneath the surface, are those for whom the divisions and allegiances of the past remain close to home.

In her hushed and leafy corner of Berlin, Nina's life is a comfortable, conventional one — until her younger sister Marie, a free-spirited writer, is attacked and left for dead. For Nina, Marie's brutal demise — and that of her unborn child — tips her own carefully controlled life into a nightmare. Stonewalled by official incompetence and subterfuge, Nina begins to realise that her sister's past and the secrets of the once-divided city are connected in unimaginable ways. As she seeks out justice for Marie, Nina becomes caught in a tangle of obsessions, lies and hidden truths that threatens to destroy her marriage, her livelihood and all that she holds dear.