Plot
Newly paroled con artist Debbie Ocean, the younger sister of Danny Ocean, reunites with her former partner Lou Miller to plan an ambitious new heist. The target is the Toussaint, a $150 million diamond necklace owned by Cartier, which Debbie intends to steal during the upcoming Met Gala at the Metropolitan Museum of Art in NYC.
To execute the plan, Debbie and Lou assemble a team of specialists: Rose Weil, a struggling fashion designer facing IRS debt; Amita, a skilled jeweler seeking independence from her overbearing mother; Leslie "Nine Ball" Jordan, a proficient hacker; Constance, a street hustler and pickpocket; and Tammy, a suburban mother who fences stolen goods.
The plan hinges on convincing actress Daphne Kluger, the year's host of the Gala, to wear the Toussaint so the team can manipulate its access. Rose is hired as Daphne's stylist and, along with Amita, scans the necklace at Cartier to create a cubic zirconia replica. Tammy secures a temporary position at Vogue to gain access to the guest list, while Lou infiltrates the event as a nutritionist. Nine Ball works to create a temporary blind spot in the museum's security system.
Debbie, seeking personal closure, manipulates Daphne into inviting Claude Becker—an art dealer whose betrayal led to Debbie's incarceration—as her date to the Gala. Lou confronts Debbie about risking the heist for revenge, but Debbie reassures her that it will not jeopardize the plan.
On the night of the Gala, Daphne becomes ill after consuming spiked soup, prompting her to rush to the bathroom. As Cartier's male guards wait outside, Constance removes the necklace unnoticed and passes it to Amita, who quickly disassembles it into smaller pieces.
Meanwhile, Tammy "discovers" the replica necklace just in time to avert suspicion. As the event is locked down and searched, members of the team smuggle the real necklace fragments out as smaller pieces while Debbie plants one piece on Becker to frame him.
Daphne later reveals she has deduced the heist and asks to join the group in exchange for keeping quiet. Debbie agrees, so Daphne becomes the eighth member of the team. Insurance investigator John Frazier, who has prior history with the Ocean family, is assigned to the case.
Although John suspects Debbie, her presence on security footage provides a solid alibi. She cooperates by arranging for Becker to be implicated; Daphne supplies a photo, and actresses posing as elderly socialites sell some of the jewels, depositing the money into an account in Becker's name. He is arrested.
As the crew celebrates their success, Lou reveals an additional layer of the heist: during the Gala lockdown, she and The Amazing Yen, a former associate of Danny's, stole a display of royal jewels on loan to the museum. They then replaced them with replicas crafted by Amita. The value of the jewels exceeds that of the Toussaint, increasing the crew's payout significantly.
With their shares secured, each member goes her own way: Amita moves to Paris, Rose opens her own store, Constance becomes a YouTuber, Tammy expands her fencing operation, Nine Ball opens a pool hall, Daphne becomes a film director, and Lou embarks on a road trip. Debbie visits Danny's gravesite and toasts a martini, content that her brother would be proud.