Melvin Purvis is driven to take down the most notorious criminals of the Great Depression, a time when bank robbers have become folk heroes to a public distrustful of financial institutions and the law. Facing a wave of high-profile crimes, Purvis vows to personally hunt down the men he deems responsible, including John Dillinger and his volatile gang, among them Pretty Boy Floyd and Baby Face Nelson, as well as the more elusive figures in Dillinger’s orbit such as Homer Van Meter, Harry Pierpont, and Charles Mackley. The pursuit intensifies as Purvis makes clear to fellow agent Samuel Cowley that vengeance is personal and that he is prepared to push beyond standard methods when necessary.
Dillinger, swaggering through crime with his crew, including Van Meter, Pierpont, and Mackley, carries himself like a legend, even as his exploits attract love and trouble in equal measure. He crosses paths with a bar patron named Billie Frechette who, despite not recognizing him at first, is swept into his life and joins the spree as his lover. The romance complicates the crime wave as the gang roams the Midwest, their confidence tested after a bold East Chicago robbery that costs them a teammate and forces the remaining members to scatter.
Purvis begins a ruthless campaign to shut down the gang, eliminating some of the crew and capturing others, while Dillinger’s crew grows more audacious. In a tense sequence at Crown Point, Dillinger is jailed but manages a daring escape by fashioning a soap bar into a gun and convincing guards to release him. This break also marks the moment Dillinger commits a federal offense by driving a stolen car across state lines. He chooses to bring along a fellow prisoner, Reed Youngblood, and together they reconnect with the gang, adding new members like Nelson and Floyd to the mix as they embark on another wave of robberies that unsettles Purvis and the press alike.
The law’s hunt reaches a fever pitch with a gruesome shootout in Mason City, Iowa, followed by the notorious raid on the Little Bohemia lodge in Wisconsin, which ends in chaos and the deaths or wounds of several gang members. As the gang fractures under pressure, Purvis and federal agents close in, while local vigilantes also contribute to the net tightening around the outlaws. The pursuit culminates in Chicago, where Dillinger’s fate takes a dramatic turn.
In a tense moment outside a cinema, Dillinger and his companions exit the Biograph Theater while Purvis and his team close in. Dillinger’s encounter with safety and law closes in the alley as Purvis, having lured him toward his firearm, shoots the gangster down. The capture is swift, but the aftermath of the raid raises questions about deceit and intervention, including Purvis’s decision to leverage the assistance of a woman connected to Dillinger.
The epilogue reveals the fates that followed. Billie Frechette’s life ultimately ends in hardship and poverty, while Anna Sage faces deportation to Romania despite Purvis’s promises. Purvis himself retires from the FBI and eventually takes his own life, and Dillinger’s image endures in the FBI’s targets used for marksmanship training. The story closes with the reminder that the legend of Dillinger and his era left its mark on both public imagination and the men who pursued them.
