In August 2005, within the confines of a small, dimly-lit cell, Dalton Russell boldly declares that he has pulled off the perfect bank robbery. In New York City, a group of masked men, clad in painter overalls and adopting various aliases all named "Steve," storm into a Manhattan bank and promptly take control, holding both patrons and employees hostage. They cleverly split the hostages into different groups, enforcing an identical look by forcing them into masks and coveralls like theirs, and they shuffle the hostages between rooms while unceremoniously demolishing the floor of one of the bank's storage areas.
As the police surround the bank, Detectives Keith Frazier and Bill Mitchell step into the fray to lead the negotiations. Russell, the mastermind behind the robbery, makes a demand for food, prompting the police to send in pizzas—each box ingeniously outfitted with listening devices. Unbeknownst to them, the robbers have anticipated this move and engage in conversation in Albanian, initially misinterpreted as Russian, which later turns out to be propaganda recordings of the late Albanian leader Enver Hoxha.
Simultaneously, the bank's founder and chairman, Arthur Case, becomes aware of the unfolding crisis and enlists the help of fixer Madeleine White to safeguard the contents of a mysterious safe deposit box hidden within the bank's vaults. As Russell breaks open one of the safe deposit boxes, he uncovers various documents from Nazi Germany. Through her connections with the Mayor of New York, White gains access to Frazier, advocating for a meeting with Russell. During their clandestine conversation inside the bank, Russell insinuates that Case’s bank was initially funded with money he had received for collaborating with the Nazis, resulting in the demise of many Jews during World War II.
Frazier, in his pursuit of ensuring the hostages' safety, demands to see them before allowing the robbers to depart. As Russell shows him around, Frazier seizes an opportunity to attack, only to be restrained by one of the other robbers. After this, Frazier concludes that Russell isn't a killer, yet this hypothesis faces immediate scrutiny when the robbers stage a hostage execution, prompting the Emergency Services Unit to prepare an assault on the bank using rubber bullets.
The tension escalates as Frazier realizes that the robbers have overheard police plans, leading them to activate smoke grenades and slip away among the hostages. In the aftermath, the police detain and interrogate the hostages but struggle to distinguish the robbers from the victims, as everyone is dressed alike. A thorough search of the bank reveals that the weapons used by the robbers were merely plastic replicas, while evidence shows that the staged hostage execution was fabricated and no money or valuables were stolen.
With no suspects and lacking evidence to prove a robbery occurred, Frazier's superior commands him to cease the investigation. Still, Frazier’s instincts compel him to scrutinize the bank's records, leading to the discovery that safe deposit box No. 392 has mysteriously never been registered since the bank's inception in 1948. Armed with a search warrant, he prepares to pry it open as White attempts to dissuade him from delving deeper. During their conversation, hints about Case’s dubious past surface. Refusing to back down, Frazier plays back a recording he secretly made that reveals an incriminating dialogue between White and the Mayor.
Eventually, White confronts Case, who reluctantly confesses that the contents of the box include loose diamonds and a Cartier diamond ring that he had taken from a Jewish friend whom he betrayed to the Nazis.
As the plot thickens, we learn that Russell’s bold proclamation came while he was cleverly hidden behind a false wall the robbers had built within the bank’s supply room. After a week of hiding, he emerges, triumphant with the contents of Case’s safe deposit box, which include crucial documents alongside a stash of diamonds. Upon leaving, he inadvertently crosses paths with Frazier, who does not recognize him. Russell then gets into a car filled with his fellow conspirators, many of whom the police had interrogated earlier.
When Frazier finally gains access to the safe deposit box, he discovers the ring and finds a note from Russell that states, > "follow the ring." This leads him to confront Case, urging White to notify the Office of War Crimes Issues at the State Department regarding Case's heinous actions during the war. Back at his home, Frazier stumbles upon a loose diamond and realizes that Russell had skillfully slipped it into his pocket during their brief encounter while exiting the bank.
