It is both. A true story and a real story are often used interchangeably. In the context of 'A Matter of Justice', it means the events depicted are based on things that actually occurred in real life, not fictional. For example, if it's a legal case being presented, the facts, the people involved, and the situations are real, and the story is true to those real - life events.
It's a real story. 'A Matter of Justice' implies that there are real - world elements at play. It could be about a fight for justice that actually took place. Maybe it involves real people who faced injustice and had to struggle to get what was rightfully theirs. The details, like the time, place, and actions, are all drawn from reality, making it a real story which is also a true story.