As the third season begins, border guard officers detain two migrants trying to flee from Poland to Ukraine. Following their trail, Rebrow accidentally stumbles across a crime scene. The violent crime leaves Poland reeling. Markowski opens an investigation, while Rebrow asks Dobosz for assistance, suspecting that there may be more to the case than meets the eye. Dobosz is busy climbing the career ladder in Warsaw, but reluctantly returns to Bieszczady Mountains.