Berlin, August 1961.
Since the death of her beloved father, Carla has been running the Nightingale & Co detective agency by herself. It's a far from easy job for a female investigator.
When the chaotic, fun-loving Wallie shows up at the door, claiming to be her half-sister, Carla's world is turned upside down. Wallie needs Carla - the Berlin Wall has been built overnight, leaving her umable to return to her flat in East Berlin.
Carla certainly doesn't need Wallie, with her secret double life and unorthodox methods for getting results. Yet the mismatched pair must find a way to work together when one of their clients is accused of murdering her husband.
Nightingale & Co is the first in a cosy historical crime series featuring the sisters of the Nightingale & Co detective agency in 1960s Berlin.