March, 1976. An IRA bombing campaign strikes terror across Britain. Nowhere and no one is safe. Minutes before a deadly tube station blast, detective constable Jane Tennison spots the bomber, Too traumatised to identify him she is nevertheless a key witness. As they battle to unmask the terrorists, the police are determined nothing will disrupt their annual Good Friday dinner dance. Hundreds of detectives and their partners will be there - Jane among them. And then Jane's memory returns. Now not only can she identify the bomber, but she is in real and present danger from the IRA. In a nail-biting race against time, Jane must convince her senior officers to believe her before London is engulfed in another bloodbath.