Washed-up revolutionary Bob exists in a state of stoned paranoia, surviving off-grid with his spirited, self-reliant daughter, Willa. When his evil nemesis resurfaces after 16 years and she goes missing, the former radical scrambles to find her, father and daughter both battling the consequences of his past.

Infamous and unpredictable, Jesse James (Brad Pitt), nicknamed the fastest gun in the west, plans his next big heist while he launches pre-emptive strikes against those looking to collect the reward the law has placed on his head. Jesse's newest recruits, Robert (Casey Affleck) and Charley Ford (Sam Rockwell), grow increasingly jealous of the outlaw. When they sense an opportunity to kill Jesse, they gun him down, but their actions backfire when Jesse's fame is elevated to near mythical status.