A mysterious drive-by shooting in a Stockholm suburb leaves two victims hovering between life and death at the Nobel Hospital, where Tekla Berg fights to save their lives. At first, the police dismiss the incident as gang warfare, but a suspicious detective enlists Tekla's help to determine if something far more complex and sinister is at play. And when a second attack is launched in a busy shopping district, it seems it's only a matter of time before terror spreads throughout the entire city.

Meanwhile, Tekla is informed that her mother's house in Dalarna county is to be put up for sale by her wealthy but distant uncle. Her childhood village hasn't crossed her mind for years, but now she decides to make one last visit. Among the things left behind in the house is an intriguing photo of her mother, in which a little girl sits on her lap at a party. Who is she? Can she help fill in the blanks in Tekla's photographic memory regarding her childhood? And what became of her?

Putting readers once more into the shoes of Tekla Berg - emergency doctor, amateur sleuth and high-functioning amphetamine addict - Blood Will Tell is a gripping and atmospheric Scandi thriller that explores the darker side of family ties.