Glass Onion ending explained: who killed Andi and why Helen burns the Mona Lisa
Spoilers ahead: this article discusses the ending.
Glass Onion ending explained: tech billionaire Miles Bron killed both Andi Brand and Duke Cody. When he burns the only evidence and his friends refuse to testify, Andi's twin sister Helen blows up his mansion with his own volatile fuel, destroying the Mona Lisa on loan from the Louvre and with it Miles's reputation.
Rian Johnson's 2022 sequel to Knives Out sends detective Benoit Blanc to a private Greek island. Johnson wanted a title about something hidden in plain sight, and the solution is exactly that: the obvious suspect did it. Here is how the ending works.
Glass Onion ending explained: what happens
Blanc announces that Miles committed both murders, admitting he dismissed the idea earlier because he overestimated Miles's intelligence. A week before the party, Miles drugged Andi and staged her suicide after learning she had found the original napkin proving she sketched the plan for their company, Alpha. Duke saw him leaving her house and, after seeing news of Andi's death, tried to blackmail him. Miles poisoned Duke with pineapple juice, to which Duke was deathly allergic, then took Duke's gun and shot Helen. Andi's journal in her jacket pocket stopped the bullet.
Helen finds the napkin in Miles's office, but Miles burns it. His friends, the Disruptors, refuse to testify. Blanc tells Helen he has done all he can and steps outside.
Why Helen destroys the Mona Lisa
Helen smashes Miles's glass sculptures, and the others briefly join in. She lights a bonfire and throws in a piece of Klear, Alpha's hydrogen-based fuel that Lionel and Claire knew was dangerously volatile. The explosion destroys the mansion and the painting.
This does two things. It proves Klear is unsafe before Miles can launch it, and it ties the world's most famous painting's destruction to Miles, who once said he wanted to be mentioned in the same breath as the Mona Lisa. With his leverage gone, the Disruptors agree to testify. Helen and Blanc watch police boats approach.
What Rian Johnson said about the ending
Johnson acknowledged in an interview on The Filmcast that destroying the Mona Lisa would not be heroic in real life, but argued that in the context of a film with this tone it was the right release. He connected it to Miles's own speech about disruption: Helen beats the disruptor by disrupting his world.
Johnson also described the film's structure to Netflix as a fugue, with the midpoint flashback introducing Helen as the character the audience can finally empathise with. The first half shows a party; the second replays it from her side.
The meaning of the glass onion
Johnson chose glass because it is clear and named the film after the Beatles song, which plays over the credits. The idea is that a mystery can look layered and complicated while the answer sits in the open. Miles presents himself as a genius, and Blanc's mistake is believing him. The ending's theme is that powerful people are often protected not by brilliance but by others' willingness to look away, which is why the Disruptors only turn on Miles once he can no longer help them.
Influences on the finale
Johnson wrote the film in 2020 during lockdown and drew on vacation mysteries such as Evil Under the Sun, Death on the Nile and especially The Last of Sheila, in which a host invites friends to play a murder game that goes wrong. Several writers have also linked the art-destruction gag to the 1997 comedy Bean.
Questions people ask
Who is the killer in Glass Onion?
Miles Bron. He killed Andi a week before the party and poisoned Duke during it, then shot at Helen.
Is Andi alive in Glass Onion?
No. Andi died before the party. The woman on the island is her twin sister Helen, posing as Andi to help Blanc.
Why did Helen burn the Mona Lisa?
To prove Klear was dangerous and to ruin Miles, which removed his leverage over his friends so they would testify.