Elliot Ness, an ambitious prohibition agent, is determined to take down Al Capone. In order to achieve this goal, he forms a group given the nickname “The Untouchables”.

When Ethan Hunt, the leader of a crack espionage team whose perilous operation has gone awry with no explanation, discovers that a mole has penetrated the CIA, he's surprised to learn that he's the No. 1 suspect. To clear his name, Hunt now must ferret out the real double agent and, in the process, even the score.

In 1940s Los Angeles, two former boxers-turned-cops must grapple with corruption, narcissism, stag films and family madness as they pursue the killer of an aspiring young actress.