The world's top assassin, Duncan Vizla, aka The Black Kaiser, is settling into retirement when his former employer marks him as a liability to the firm. Against his will, he finds himself back in the game going head-to-head with an army of younger, faster, ruthless killers who will stop at nothing to have him silenced.

Disillusioned with the intelligence community, top contractor Edward Snowden (Joseph Gordon-Levitt) leaves his job at the National Security Agency. He now knows that a virtual mountain of data is being assembled to track all forms of digital communication -- not just from foreign governments and terrorist groups, but from ordinary Americans. When Snowden decides to leak this classified information, he becomes a traitor to some, a hero to others and a fugitive from the law.