This film is set in London and begins with a terrorist bombing at a crowded market that kills 120 people. An immigrant from Turkey who has a wife and teenage son is immediately arrested on the basis of a tip and accused of being the mastermind of the plot.
The British government invokes national security and sets in motion a trial system that consists of both open and closed court hearings. The defendant is assigned two lawyers, one (played by Eric Bana who looks like Tom Cruise without the smirk) to appear in the open trial and the other (played by Rebecca Hall) in the closed one. Only the second lawyer can see the classified material and cannot have any communication with the other lawyer. The closed trial excludes everyone except the judge, the prosecutor, the single defense lawyer, and the stenographer. Even the defendant cannot be present.
I cannot discuss the film much more without giving away the plot. But it is a low-key thriller in which the story is kept lean and focused, with minimal action. What it does show is how the British government is just like the US government in abusing its power to monitor everyone all the time legally and illegally and to corrupt the judicial system and hide its own wrongdoing.
Here’s the trailer.