Olga Balicka returns to work after maternity leave. A million urgent matters await her. However, the Commissioner wants to look at an investigation that has long been discontinued. Someone killed Barbara Muszyńska in the staircase of Olga's tenement house, but due to the lack of traces, the perpetrator was not detected. First, however, you have to solve the mystery of the death of Beata Nowak, a controversial manager at the BigPharma pharmaceutical concern.

Is it a coincidence that both murdered women worked for the same company? Olga feels uneasy knowing that her sister is also employed there. What secrets is the president of BigPharma hiding? Is it a company that works for the good of humanity? Or does he rather not care about the sick, and focuses only on his own profits?

Prosecutor Kalina Talarek joins the investigation. Cooperation with the investigators' marriage is not a bed of roses. The prosecutor does not like Olga, but she is interested in Kornel. How much will she mess up?

The duo of Olga Balicka and Kornel Murecki are back in the third part of the series. And with them, someone else joins the action... Someone who was not captured during their first joint investigation.

When fear for loved ones comes to the fore, the stakes are high.

The above description comes from the publisher.