Tranquilizer Gun (1997)

Janko's life seemed to be in order. He had a great job and was in a steady relationship with his comissioner's daughter, whom he decided to leave after he falls for a pickopocket named Nana. However, even that relationship can't seem to fullfill his desires, so he starts a steamy affair with Marta Štajner, the widow of wealthy wartime-era crime lord Dragutin Karl Štajner. Wanting to impress his new fling, Janko decides to abuse his position as a police officer and starts getting further into criminal territory, but, he quickly gets in way over his head.