Prime Suspect: Tennison follows the early career of the iconic DCI Jane Tennison, the role that made Helen Mirren a household name. The drama charts her rise through the ranks of the police force in the 1970s and her first major murder investigation. As she navigates a male-dominated profession and faces sexism and discrimination, Tennison must prove herself as a capable detective while dealing with personal struggles and relationships. The series explores the challenges she faces as a young woman in a tough and demanding job, and how she overcomes obstacles to become one of the most respected detectives in the force.