Londres, Inglaterra, abril de 1980. Varios terroristas asaltan la embajada de Irán y toman rehenes. Durante seis días, se mantienen tensas negociaciones mientras las autoridades deciden si debe intervenir un pelotón militar.

Norfolk, England, 1770. The nephew of an innkeeper and the son of a reverend maintain a very close friendship until, after living a great adventure, they must separate their paths. The former will head his footsteps to London and bound his destiny to Lloyd's, a thriving insurance company; the latter will eventually become one of the greatest heroes in the history of the British Empire.

A thought provoking documentary feature film providing a comprehensive exploration of the evolution of signals intelligence over the past century. Whether you're intrigued by the secretive world of intelligence agencies or concerned about the implications of digital surveillance, this film will leave you with a deeper understanding of the role signals intelligence plays in society.