Injustice - Episode 1
Barrister William Travers is asked by an old university mate Martin Newell to represent him on a charge of murdering his mistress and secretary. He claims to be innocent but that is far from Travers' main concern. He and his wife Jane left London many years before due to a murder case. At that time, they had agreed that he would neither take on murder cases nor would he take on cases in London. William feels obligated to take on his friend's case. Meanwhile, DI Mark Wenborn is upset with Travers who was successful in having a client acquitted and in doing so was able to show that DS Harry Bowman planted incriminating evidence. DI Wenborn is now investigating a murder, that of itinerant farm worker John Jarrold.
Injustice - Episode 2
Will Travers meets his old friend Martin Newell in jail but he hasn't yet decided to represent him. Newell freely admits to having an affair with the victim, Lucy Wilson, a secretary at his firm. He flatly denies that he had anything to do with her death. He claims he had gone out to get her some fries and came back less than a half hour later to find Lucy strangled on the bed. Lucy thought they were followed to their hotel and afterward the police couldn't find his laptop, which contained sensitive company information. Martin's wife Caroline is convinced that he was set up. Will visits his old Chambers where he has flashes of an incident there. Jane Travers tries to get one of her pupil's works published. Meanwhile, DI Mark Wenborn investigates the murder of John Jarrold and interviews an elderly local who saw a strange car go past her house on the night of the murder. Jarrold turns out to be Philip Spaull who has had several encounters with the police.
Injustice - Episode 3
Will focuses on the missing computer from Martin Newell's hotel room. The hotel maid recalls seeing a laptop computer in the room and another hotel guest remembers seeing Martin in the elevator. The dead woman had made several calls from her phone the day she died and there is a reference to Agadir, in her notepad. Martin speaks to his bosses at work and they seem to be most concerned about what was on his missing computer. DI Mark Wenborn looks into Philip Spaull's background and learns that Will Travers was his barrister when he was charged in a bombing incident two years ago. He also learns that Will fell seriously ill after successfully defending him. Wenborn has his own problems when his wife is arrested for shoplifting. Jane Travers meanwhile may have found a publisher for one of her student's stories. The publisher wants to know why the boy is in prison and Jane sets off to check into his background.
Injustice - Episode 4
While he's out for dinner with his daughter, someone steals Will's papers on the case. The dead woman, Lucy Wilson, had a criminal record from when she falsely accused a rich boy at school of rape and then tried to blackmail him. They trace the number she called to a journalist, Jameel Khan, who is investigating the oil industry. They also find CCTV footage of Martin Newell leaving the fast food restaurant as he claimed but the time is off. DI Mark Wenborn thinks there's a connection between the gun used to kill Philip Spaull and that used by Alan Stewart, one of Jane Travers' at the youth offenders prison who shot a school bully. Alan becomes a victim of Wenborn's rage and he tells him what he wants to know. At home, he takes his rage out on his wife as well. Jane gets bad news when she shows up at the youth detention facility.
Injustice - Episode 5
The trial begins and Will puts on an effective defence. He's learned that Lucy was planted in the oil company's offices to gather information on the disposal of toxic waste. He also learns the meaning of Agadir. Martin Newell presents himself quite well at the trial. DI Mark Wenborn desperately wants to to arrest Will for the murder of Philip Spaull and coerces a prospective witness to alter his earlier statement to the police to implicate the barrister. At home however, Wenborn has a physical encounter with his wife. In the end both Lucy's killer and the man who killed Spaull are revealed.