It featured a barrister who had moved with his family from London to East Anglia after he had a breakdown. The reason for that was that he defended a man who blew up a car containing (unwittingly) a young boy who died. He is a barrister that strongly believes in defending innocent people. He never took on a briedf that he believed was guilty or told him he was guilty.
He than stumbled across the aquitted defendent and realised he was guilty- in fact hecnfessed. He then shot him. The story line was then linked to his detection by a dysfunctional detective who kept all information in his brain. When he was about to reveal and arret theister his own domestic crisis ended up in his own death, and with it the knowledge of evidence he had pieced together.
The next link was his old friend fromyears ago who asked for his defence. He too claimed innocence and when he found out the truth Travis, the barrister shot him also.
It was left I believe making the vewer eieve he got away with the two shootings and that justice, albeit vigilante, was served - hence title 'Injustice'.
Personally I was rivetted. Brilliant drama.