Underworld Trilogy: The Cop (2011)

A detective working with the narcotics unit of the Stockholm police, PEKKA MANNINEN is called to Finland with the task of charting the route via which heroin is smuggled from St. Petersburg to Finland and the rest of the world. The Helsinki police department's narcotics unit has already been on the case with no results, and so the rough-and-ready Manninen goes undercover into a Russian drug operation. Treading the fine line between the legal and the illegal, Manninen begins to confuse the roles of police officer and criminal, until he goes too far and there's no turning back.