Helen Mirren returns as police detective Jane Tennison in the fifth cycle of the award-winning television series Prime Suspect. Tennison is transferred to Manchester, where her superiors, unsure of what to do with her, initially put her in the public relations department, explaining police work to schoolchildren. Tennison wants a more substantial assignment, and she gets her wish when she is sent out to investigate the murder of a drug pusher. But Tennison quickly discovers the case is more complex than she imagined; a 14-year-old boy has claimed responsibility for the murder, but she believes the true culprit is a man known as The Street (Steven Mackintosh), who controls Manchesters drug traffic and has a number of lieutenants to cover his tracks. Tennison also finds herself in potentially hot water when she becomes romantically involved with DCS Ballinger (John McArdle), who is her superior -- and also a married man. ~ Mark Deming, All Movie Guide