'Closed Circuit' is an international suspense thriller that elucidates how a high-profile terrorism case unexpectedly binds together two ex-lovers (Eric Bana and Rebecca Hall) on the defense team – testing the limits of their loyalties and placing their lives in jeopardy.
One morning, a busy London market is decimated by an explosion. In the investigation that follows, only one member of the suspected terrorist cell survives, Farroukh Erdogan (Denis Moschitto), who is arrested and imprisoned.
Preparations begin for what promises to be the trial of the century. However, the complication is that the government plans to use classified evidence to prosecute Erdogan, evidence so secret that neither he nor his lawyers can be allowed to see it.
For this reason, Attorney General (Academy Award winner Jim Broadbent) must appoint a Special Advocate, an additional government-approved defense lawyer, Claudia Simmons-Howe, (Rebecca Hall). Only she has the required security clearance to see classified evidence and who can argue for its full disclosure when the trial moves to 'closed' session.
The rules for the Special Advocate are clear; once the secret evidence is shared with her, Claudia will not be allowed to communicate even with the defendant or with other members of the defense team.
But just as the case is on the eve of going to trial, Erdogan’s lawyer dies suddenly, and a new defense attorney, Martin Rose (Eric Bana), quickly steps in. Martin is tenacious, driven, brilliant, but he's also Claudia’s ex-lover. The two lawyers make an uncomfortable pact to keep their former affair hidden. But as Martin begins to piece the case together, the outlines of a sinister conspiracy emerge, one that will draw him and Claudia dangerously close again.