Detective Superintendent Jane Tennison (Helen Mirren) returns for a sixth investigation and another battle with the male establishment. Tennison is back in London heading a large murder squad dealing with numerous cases. She's facing the prospect of early retirement and has ambitious underlings snapping at her heels. When the body of a young Bosnian woman is found with evidence of torture Tennison takes personal charge of the case. Her investigation leads her to one possibly two Serbian war criminals eager to silence the last witness to a massacre a decade before.