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New policewoman Anna Oster arrives at HQ in Warsaw and is paired up with deputy Krzysztof Tarkowski, the star of the investigation department.

During an investigation, Tarkowski's conflict with Oster intensifies. Ola tries to inform the deputy that the new policewoman has something to hide.

A bomb explodes in the city, killing a boy who was in his father's care. The police focus on the mother, who is sensitive about her young daughter.

Under the influence of Rogoż, Tarkowski gains confidence in Oster. He tells Ola to stop investigating, which only enrages her further.

Ola tries to find out how prosecutor Wójcik knows Oster. Meanwhile, Oster gets a call from Hartman. Tarkowski overhears the call and follows Oster.

Oster and Tarkowski are interrogated by prosecutor Wójcik, who is conducting an internal investigation into Hartman's mysterious death.

A 40-year-old woman falls from a balcony on the top floor of a high-rise building. Prints and photos are found in the apartment but don't reveal much.

Ola meets Doctor Kalita in the hospital and tries to get information about Commissioner Oster.

The body of a famous sports commentator is found in an apartment. His neighbors liked him – and so did the ladies – as the police soon establish.

Tarkowski visits the residence of a famous financier after traces of blood are found in his home. Will this lead help with locating his missing wife?

The police receive reports of two attacks on women in a single night. Ola partners up with Tarkowski again, but she quickly gets into trouble.

Rogoż attends Commissioner Matusiak's farewell party. When he leaves he decides to go see Oster, who is holed up at her forest lodge.

The life of an officer is on the line. Oster finally finds the key figure who can reveal the truth about her past.