The story begins as WikiLeaks founder Julian Assange and his colleague Daniel Domscheit-Berg team up to become underground watchdogs of the privileged and powerful. On a shoestring, they create a platform that allows whistle-blowers to anonymously leak covert data, shining a light on the dark recesses of government secrets and corporate crimes. Soon, they are breaking more hard news than the world's most legendary media organizations combined. But when Assange and Berg gain access to the biggest trove of confidential intelligence documents in U.S. history, they battle each other and a defining question of our time: what are the costs of keeping secrets in a free society-and what are the costs of exposing them?