In this true story, Veronica Guerin is an investigative reporter for an Irish newspaper. As the drug trade begins to bleed into the mainstream, Guerin decides to take on and expose those responsible. Beginning at the bottom with addicts, Guerin then gets in touch with John Traynor, a paranoid informant. Not without some prodding, Traynor leads her to John Gilligan, the ruthless head of the operation, who does not take kindly to Guerin's nosing.

An Irish journalist writes a series of stories about drug dealers.

Based on a true story, this is about the Irish journalist Veronica Guerin (Cate Blanchett), a reporter for The Sunday Independent, who exposed some of Dublin's most powerful crime barons and drug lords in 1996. But later that year she was gunned down by assasins hired by the same criminal drug lords she exposed.