The Girl Who Takes an Eye for an Eye

The fifth installment in the Millennium series opens with Lisbeth Salander, the reclusive hacker and mathematical genius, serving a two-month sentence at Flodberga, Sweden's only maximum security women's prison. She was convicted of unlawful use of property and reckless endangerment in connection with events following the murder of Professor Frans Balder and has been transferred to the secure wing because of threats from her estranged twin sister Camilla's criminal network.

The B Unit where Salander is housed is controlled by Benito Andersson, a life-sentence gang leader who has intimidated the staff into submission. Warden Alvar Olsen has been cowed ever since Benito described the route to his daughter's classroom as a veiled threat. Salander observes Benito's gang abusing Faria Kazi, a young Bangladeshi woman imprisoned for pushing her older brother through a window. Determined to act, Salander overpowers Olsen and strikes a deal: She will help restore order and protect Faria if he gives her access to an internet-connected computer. Using his terminal, she hacks into databases connected to the Registry for the Study of Genetics and Social Environment, downloading documents and lists of names.

Salander's interest in the Registry stems from a visit by her former guardian, the elderly lawyer Holger Palmgren. A former secretary at St Stefan's psychiatric clinic, where Salander was once a patient, had given Palmgren documents about Salander's childhood. Palmgren mentioned the Registry and a woman with a fiery birthmark on her throat who had visited Salander as a child. Salander asks Mikael Blomkvist, the investigative journalist at Millennium magazine and her closest ally, to look into a name from the lists: Leo Mannheimer, a 36-year-old partner at the financial firm Alfred Ögren Securities.

Blomkvist discovers that Mannheimer is a melancholic, intelligent man trapped in a career chosen by his domineering parents. His ex-girlfriend Malin Frode describes Leo as a gifted pianist who lacked the drive to break free from the family business. Blomkvist uncovers a 25-year-old article about psychologist Carl Seger, shot and killed during an Alfred Ögren hunting party that included Leo's father, Herman Mannheimer. Seger had been Leo's therapist and closest friend.

Meanwhile, Palmgren finds confidential notes naming sociologist Martin Steinberg, who oversaw foster placements for the Registry, and psychologist Hilda von Kanterborg. He calls Steinberg, who denies everything but sounds nervous. Palmgren realizes the call was a mistake. The consequences are lethal: Someone disconnects his mobile, cancels his home care visits, and sends a woman posing as a substitute carer who applies two lethal Fentanyl plasters to his back. Blomkvist arrives that evening and tears off the plasters, but Palmgren manages only five words before dying: "Talk to Hilda von..."

At Flodberga, Benito enters Faria's cell with a stiletto knife. Salander intervenes and strikes Benito down. Olsen claims responsibility for the assault, and Benito, barely conscious, pronounces a death sentence on Salander.

Blomkvist's investigation deepens. He meets Ellenor Hjort, who had been engaged to Seger, and learns that Seger's university supervisor was Hilda von Kanterborg, connecting Palmgren's dying words to a real person. He discovers that Leo may have been adopted from the traveller community and that his personal file appears rewritten to conceal irregularities. Then Malin reports that Leo, always left-handed, now appears right-handed and has become a guitar virtuoso. Blomkvist researches mirror-image twins, identical twins who are each other's physical reverse, and suspects that the person living as Leo may be his twin brother.

Blomkvist travels to Nyköping to meet Hilda, who is hiding after fleeing from the woman with the birthmark. Hilda reveals the full history: The Registry was an offshoot of Sweden's old State Institute for Racial Biology, run by Steinberg and a psychoanalyst named Rakel Greitz, who orchestrated Palmgren's murder. Inspired by an American researcher who secretly separated twins through adoption agencies, Greitz and Steinberg deliberately separated twins and placed them with families in contrasting circumstances to study heredity and environment. Among their subjects were brothers originally named Anders and Daniel Brolin, born to a musical traveller family. Anders was renamed Leo Mannheimer and given to a wealthy family, while Daniel was left in an orphanage and later placed with an abusive farmer. When Seger insisted the twins should know about each other, he was killed during a hunting party; Hilda suspects murder but has never had proof. Hilda also reveals that Greitz tried to separate Salander and Camilla as children. Six-year-old Lisbeth escaped by jumping from a window and running to Storkyrkan cathedral in Stockholm, where she saw the statue of St George killing the dragon and interpreted it as an image of the world's indifference to violence.

Flashbacks trace Daniel's journey. He discovered Django Reinhardt's music at 14 and found pride in his Roma heritage. He ran away from the farm, reached America, changed his name to Dan Brody, and became a jazz musician. A year and a half before the main events, a woman at a Berlin jazz club mistook him for Leo. Dan discovered his twin online, flew to Stockholm, and played guitar outside Leo's apartment. Leo opened the door, and the brothers met for the first time. They planned to confront Greitz, but she arrived with Benjamin Fors, her loyal enforcer, injected Leo with synthetic curare, a paralyzing agent, and gave Dan an ultimatum: assume Leo's identity or be framed for murder. Left alone with his paralyzed brother in a remote forest, Dan resuscitated Leo and whispered for him to flee. The brothers reunited on Christmas Eve and swapped identities: Leo flew to Toronto, while Dan remained in Stockholm as Leo Mannheimer.

After her release from prison, Salander investigates the death of Jamal Chowdhury, a young Bangladeshi blogger whom Faria loved and whose older brothers killed to enforce their control over her. Using neural network analysis of hand movements, Salander links Khalil Kazi, Faria's youngest brother, to an unidentified figure at the Stockholm metro station where Jamal died. She provokes Bashir Kazi, one of Faria's older brothers, into a filmed confession and distributes the footage.

Blomkvist confronts Dan at Alfred Ögren's offices. As they walk through Stockholm, Benjamin attacks Blomkvist with a syringe, but Dan tackles him to safety. That same day, Salander is ambushed by Benito, who has escaped from hospital with help from the Svavelsjö motorcycle gang, and Bashir. They throw her into a van and drive north. Salander whispers a codeword into her modified phone before it is taken, activating a distress signal to Hacker Republic, her network of elite hackers. Plague, a fellow hacker, tracks the van through traffic cameras until it vanishes into forest. He calls Chief Inspector Jan Bublanski, who mobilizes a rescue. At Flodberga, Faria provides directions to a hidden clearing where Bashir once took her as a child.

In the van, Benito prepares her ceremonial dagger. Salander hears approaching vehicles, launches herself upward, is stabbed in the side, headbutts Benito, kicks open the door, and escapes into the forest. Bublanski's team arrests the captors. Wounded, Salander returns to Stockholm and confronts Greitz at her apartment. She disarms Greitz of a syringe and prevents her from jumping off the balcony. Bublanski's officers arrest Greitz and Benjamin and find documents related to Project 9, the twin-separation experiment connected to the Registry, in a hidden safe.

Blomkvist finishes his article for Millennium, but publication of the print issue is delayed by a sudden stock market crash accompanied by a disinformation campaign on social media. The twins story is published online.

In the epilogue, Storkyrkan cathedral is packed for Palmgren's funeral. Salander, wearing an uncharacteristic black suit, walks to the altar. She calls Palmgren "a pain" who was "dumb enough to believe in people, even in me." The fire the dragon breathes, she says, is the same fire inside everyone who is being trampled on, a fire that can destroy, but which sometimes, if someone like Palmgren takes an interest, becomes a force that allows a person to strike back. She bows to the coffin, says "Thanks" and "Sorry," catches Blomkvist's eye, and disappears through the church door into the lanes of Gamla Stan, Stockholm's old town.