Cora Davies is arrested for smuggling heroin. She pleads guilty but most of the drugs are missing. The arresting officer D.S. McCabe needs a source, so pressures informant Henry to sign a statement. Henry visits Frank Cartwright for help.

Black doctor Nola Marshall is arrested for drunk and disorderly, four hours later she is dead in police custody. The Association of Black Families put up money for Frank Cartwright to get a verdict of unlawful killing by the police.

Suspected Irish terrorists, known as the Cenotaph 7, are sent to trial for Contravening the Explosive Substances Act when a rocket attack was thwarted. Cartwright smells a rat when Eamonn Hand claims he is Special Branch informer.

Two deaths in two very different England's bear on the destiny of Fetter Court, now riven with internal dispute. Katherine defends a father who confesses to child murder in circumstances of extreme public revulsion, while Frank's loss nearer to home brings him face to face with the hardest decision of his professional life.

Valentine, a senior MI5 operative speaks out about Geoffrey Katz. He is behind the Secret Team, a CIA and Met Police squad who aim to oust the Left. He is arrested and the Chambers have to run an Official Secrets case without all the facts