Saoirse Ronan turns the classroom into a pressure cooker in 'Bad Apples'

Paramount dropped the first trailer for Bad Apples on 1 July 2026 and, within a single beat, reframed the year’s most provocative indie thriller: Saoirse Ronan plays a teacher who decides, off the books, that her worst student may be a sociopath, and that the school itself is making it impossible to do anything about it.

The film, directed by Swedish filmmaker Magnus von Horn, adapts Rasmus Lindgren’s Swedish novel De oönskade (The Unwanted) into a pressure-cooker chamber piece set almost entirely inside a Stockholm primary school. Ronan plays Laura, a substitute who, after a single chaotic term of defiance, threatens and broken windows, narrows her suspicions onto a single ten-year-old boy and sets out, in private, to prove him dangerous. The trailer’s rhythm is deliberate: a child humming a nursery rhyme cuts to the squeak of trainers on a gym floor; a parent’s email chain lands on Laura’s laptop at night; a stack of incident reports gets re-read with a different thesis. By the time Ronan’s voiceover admits she has started testing the boy, the classroom has stopped feeling like a workplace and started feeling like a holding cell.

The set-up: a teacher on her own

Von Horn has talked up the project as a study of institutional paralysis, and the trailer carries that thesis in its bones. Laura is not a vigilante in the Hollywood sense; she is a teacher who has exhausted every channel her school offers and concluded, slowly and reluctantly, that those channels are designed to protect the institution rather than the children in it. That is the argument that animates De oönskade, and that Bad Apples clearly wants to inherit: when a problem child is, in the teachers’ whispered shorthand, “one of ours,” the paperwork loops and the meetings reset.

Ronan is, on the available evidence, unusually well cast. Her filmography already includes the cold burn of Lady Bird, the austere control of The Outrun, and the patient moral arithmetic of The Lost Daughter, the last of which won her a nomination for the Academy Award for Best Actress and positioned her, long before thirty, as one of her generation’s most disciplined screen actors. She does not play Laura as a crusader. She plays her as a competent professional who has started keeping a private file. The marketing materials lean on that ambiguity: the camera stays close enough to Ronan to register the moment a laugh line flattens into a frown.

The book behind the film

Lindgren’s source novel was published in Swedish in 2017 and quickly travelled. It was translated into English by Elizabeth Clark Wessel, and the English edition, retitled The Unwanted and published by Dalkey Archive Press, made the case to Anglophone readers that a school can be a closed system in which a single difficult child becomes, by default, an institutional liability. Lindgren had been a teacher himself, and that biography is, in effect, the film’s subtext. The novel does not romanticise Laura; it subjects her to a slow escalation, and the reader is given enough interior access to see the moment professional scepticism curdles into something more forensic.

That interior collapse is, in the trailer, the engine. The boy’s name in the marketing is simply the boy; the parents are friendly; the headteacher is sympathetic; the other teachers are exhausted. There is no villain in the conventional sense, which is the point. There is a child whom the system cannot process, and a teacher whom the system cannot restrain.

The director and the room

Magnus von Horn arrived at Bad Apples with a distinctive visual grammar. His earlier feature, The Here After, played at Cannes in 2015 and was described in the European festival circuit as a slow-burn portrait of a teenager returning to a rural Swedish community after prison. Critics noted the camera’s patience and its refusal to editorialise. Bad Apples, judging by the trailer, will trade that patience for claustrophobia: the framing is tight, the colour palette is institutional, and the school itself, with its muted corridors and yellow-bulb classrooms, does most of the storytelling.

The supporting cast, also drawn from the marketing materials, includes Eddie Marsan as the headteacher and the Swedish actors Eva Melander and Henrik Dorsin in roles that the trailer deliberately keeps under-credited. That is a smart economy: a film about the failure of institutional sightlines needs faces the audience does not arrive with, so that the audience reads them the way Laura reads her students, fresh.

What the trailer is doing

Marketing for films about disturbing children has tended, in the last decade, toward one of two registers: the prestige thriller (a child as symptom, a parent as investigator) or the social-realist case study. Bad Apples is, on the trailer evidence, refusing both. There is no procedural kit, no crime-scene wireframe, no police procedural scaffolding. There is a teacher, a desk, a stack of A4, and a child.

That is also where the film’s risk lives. The Lost Daughter succeeded partly because it trusted the audience to stay with its protagonist through her worst impulses; Bad Apples will need that same trust, but on a different axis. Laura is not a mother, and her targets are not adults. The film will be read, fairly or otherwise, as a parable about teacher burnout, about Swedish welfare consensus, about the policing of childhood behaviour, and possibly about female professionals who exceed their remit. The trailer does not settle those readings so much as invite them.

The stakes for Ronan

Ronan has four Best Actress nominations to her name, including her most recent for The Outrun, and the conventional career move at this stage would be to consolidate with a high-budget studio swing. Bad Apples is, by every indication, the opposite: a low-budget European adaptation in which she carries a contained, morally uncomfortable story on a near-empty set. That choice, if the film lands, is exactly what positions her for the kind of late-career repositioning that the Academy has historically rewarded: think Olivia Colman’s The Favourite pivot, or Cate Blanchett’s Blue Jasmine turn, where the box office shrinks and the citation count climbs.

If it does not land, the same arithmetic works in reverse: a film in which a young woman harasses a ten-year-old on camera is the kind of project that critics can flatten, and a festival prize in Cannes or Berlin would not insulate it from a hostile reading. The trailer, at this point, is hedging towards the former outcome. Ronan’s face in the final third of the cut is composed, alert, and visibly alone in the frame.

A release date has not yet been announced in the materials Paramount and First Showing have released. What is already clear is that the film has been positioned, deliberately, as an awards-season proposition built on a single performance. The question Bad Apples will be asked to answer, from Berlin onward, is whether Ronan’s presence is enough to hold a story this uncomfortable at feature length.

Desk note: Monexus framed this from the primary marketing assets (the 1 July trailer, Paramount materials, the Lindgren source novel) rather than aggregator coverage, because the wire desks have not yet amplified the release. Wikipedia is the bridge to Ronan’s nomination history and to Lindgren’s English-language translation; the deeper editorial read sits in the trailer itself.