Plot

Transferred home after a traumatizing combat mission, a lesbian soldier uses her lethal skills to hunt down the man who hurt her sister.

Klara is a 33-year-old interpreter in the French Army. After experiencing the horrors of war in Syria, she's transferred to Nice as part of Operation Sentinel, and there with her sister Tania and their mother, she tries to rebuild her life. But one evening, Tania is found half-dead on the beach after going to a nightclub; she had been raped and beaten. Klara resolves to do everything to find the attackers and avenge their crime against her sister. Her merciless hunt leads her to Yvan Kadnikov, the son of a powerful Russian oligarch of the French Riviera.

Klara serves in Syria in the French Army as an interpreter for Opération Chammal. After the apprehension of a suspected terrorist, she witnesses the man's young son blow himself up at his father's behest with explosives hidden on his body. Traumatized by the blast and experiencing migraine headaches from it, she is transferred home to Nice and moves back in with her mother, Maria, and her sister, Tania, while serving in counter-terrorist operations as part of Opération Sentinelle. On patrol, her trauma manifests itself in impulsive, sometimes disproportionally violent behavior towards suspects. The painkillers she was prescribed are not enough for her and she begins to buy more illegally.

One night, Klara and Tania go out to a nightclub. Tania separates from Klara to join a party of Russians and signals to Klara that she is leaving with them. Klara keeps an eye on her sister as she begins to dance with a woman, and afterwards has a one-night stand with her. The next day she is notified that Tania had been raped and savagely beaten into a coma. Klara starts her own investigation of the crime, inspects the club's security footage, finds out the name of the man Tania was with, and takes a photograph of him in the footage. Captain Muller of the French Police, who is leading the investigation, identifies the suspect as Yvan Kadnikov, the son of Leonid Kadnikov who is an influential and well-connected Russian tycoon. Yvan is hiding out in his father's villa at Saint-Jean-Cap-Ferrat, but both have diplomatic passports and immunity, making them untouchable without a complicated legal process.

Unwilling to wait for justice, Klara catches Yvan at the nightclub and he tells her that he had not touched her sister. His friends come to his rescue and Klara is evicted after a fight with them. Later, she infiltrates Leonid's villa to find Yvan, but is captured by Leonid's bodyguards. Leonid taunts Klara, freely admitting that it was he who had raped Tania since his son was not interested in women because he was a homosexual. He leaves her to be drowned by his guards, but Klara fights free and escapes. Tania later awakens from her coma, but decides not to press charges despite Klara's urging her to do so. While outside her sister's hospital room, Klara sees a news report in which Leonid states that he will be returning to Russia soon. She notices a nurse rushing past her and right afterwards Tania has a sudden embolism. Suspecting an attempt on her sister's life, Klara pursues and catches and beats up the female assassin. Captain Muller informs Klara that she had been sent by Leonid.

Now fully bent on revenge, Klara steals several weapons from her garrison's armory and sneaks into Leonid's hideout. After killing the bodyguards, she pushes Leonid off a bannister when he tries to bribe her, and when she observes his body assumes he's been killed. Klara is stabbed by Yvan and shoots him dead. Seriously injured, she retreats as a tactical police unit arrives. Leonid, however, surprisingly survived the fall and regained consciousness.

Three months later, Leonid is in his Dubai hotel suite and asks the hostesses for room service. Disguised as one of them, Klara brings him a fruit basket, grabs a fork, and rapidly stabs Leonid several times in the jugular and around the neck with it. She secretly travels back to Nice to check in on Tania from a distance. Tania is hanging out with friends and has physically recovered from her ordeal. After observing Tania without her noticing and seeing that she is all right, Klara walks away, now as a fugitive from the law. (thanks to Wikipedia)