"Instinct" is a 13-episode contemporary crime series with an intriguing female heroine in the lead role. Anna Oster (Danuta Stenka) is a mysterious and attractive lady commissioner from the investigation department of the Warsaw police station. Thanks to his unique instinct, Oster solves, along with his younger partner, Piotr Tarkowski (Szymon Bobrowski), complicated criminal riddles. Anna's appearance in the investigation department causes a lot of confusion. By decision of the commandant Jan Rogoż (Paweł Królikowski), Tarkowski's current partner Aleksander Lewicka (Marieta Żukowska) is transferred to the position of press officer and he will start to fear losing his position. A special feature of Anna Oster is her mysterious past, which will slowly reveal itself to the viewer and ... to herself. What is the Commissioner's past?