Eight men sit down for breakfast at a diner, but aside from the boss, Joe Cabot, and his son, “Nice Guy” Eddie Cabot, the rest use aliases: Mr. Brown, Mr. White, Mr. Blonde, Mr. Blue, Mr. Orange, and Mr. Pink.
The group embarks on a diamond heist, but things take a turn when Mr. White rushes away with Mr. Orange, who has been shot and is losing a significant amount of blood in the backseat of White's car. Once they reach their hideout, they are met by Mr. Pink. He is quick to express his concerns, suspecting that their mission was a setup and that the police were lying in wait. Mr. White shares grim news: Mr. Brown is dead, Mr. Blue and Mr. Blonde are unaccounted for, and the terrifying Mr. Blonde has killed several civilians during the heist. Enraged, White cannot believe that Joe would partner with someone as deranged as Blonde. As tensions rise, Mr. Pink has hidden the diamonds yet hoists a debate regarding getting medical help for Mr. Orange, leading to a standoff where they draw firearms on each other. Their conflict pauses with the sudden arrival of Mr. Blonde, who brings along a kidnapped officer, Marvin Nash.
In a flashback, we see Mr. Blonde meeting with the Cabots after finishing a four-year prison sentence. Grateful for their offer of a no-show job for keeping Joe's name out of trouble, he ultimately desires to return to legitimate work, leading him to join the heist crew.
Back in the present, White and Pink attempt to extract information from Nash through force. Eddie interjects, instructing them to follow him to dispose of the getaway vehicles, leaving Blonde to keep an eye on Nash and Mr. Orange. Despite Nash’s pleas of innocence, Blonde disregards him and escalates his brutality, severing Nash's ear with a straight razor, and preparing to incinerate him. But just then, Mr. Orange shoots Blonde dead, revealing to Nash his undercover cop status and that the police will be arriving when Joe comes to the warehouse.
Soon after, Eddie, Pink, and White return, and Orange tries to convince them that Blonde was plotting against them all along. Eddie, however, shoots Nash, convinced of Orange’s deceitfulness since Blonde was loyal to their family. With the impending arrival of Joe and the critical accusation against Orange, an explosive Mexican standoff transpires. Under the tension, all three men fire their weapons, resulting in the demise of both Cabots, with White and Orange also sustaining injuries.
In the chaos, Mr. Pink seizes the opportunity to escape with the diamonds. As Mr. White cradles the mortally wounded Mr. Orange, Orange admits his role as an undercover officer. White, pained by this revelation, presses his gun to Orange’s head. Just as the police storm into the warehouse and demand White to drop his weapon, gunfire erupts, leading to White’s heartbreaking collapse.
