Nightsiren (, ) is a 2022 Slovak-Czech feminist psychological horror drama by director Tereza Nvotová. The film premiered at the Locarno Film Festival, where it won the Golden Leopard â Filmmakers of the Present award.
While running away from her abusive mother, a girl named à  arlota accidentally pushes her sister Tamara off a cliff. Years later, à  arlota, now a young adult, returns to the village, summoned by a letter from the mayor, requesting her to claim her mother's inheritance. Because she ran away as a child and was never found, she is met with distrust and superstition: She and Tamara had been claimed to have been taken by an accused witch, Otyla, a neighbour of their childhood home.
Told that the mayor is away through the Easter holidays, à  arlota settles into her old, burnt-out home and befriends local Mira. As part of a tradition, locals eventually throw a fighting Mira into a lake and attempt the same with a screaming à  arlota, who kicks an onlooking child and is not believed when she asserts that it was an accident.
Helena, a gender non-conforming local who is in love with Mira, mentions that Otyla was taking care of a "wild child". The child was taken away because it was mute and bit people. Ã Â arlota believes that child might have been Tamara.
à  arlota confides in Mira that she had a miscarriage, and feels guilty about it, as she does not want any children and feels that that lack of love must have caused the fetus's death. à  arlota's boyfriend left her afterwards. Helena's father TomÃ¡à ¡ later attempts to rape Mira, who manages to fight him off and runs into the woods. TomÃ¡à ¡ then has sex with his devout wife Anna, who prevents him from pulling out while climaxing.
TomÃ¡à ¡ eventually threatens his two young sons, Helena's brothers, with violence, and they run off. At a midsummar celebration, people sing, consume drinks prepared by Mira with her own herb mixture and start dancing. While dancing, a local gropes à  arlota, who pushes him off. He falls to the ground, and the bystanding locals get angry, victim-shaming her for dancing "like a whore". Frustrated, à  arlota walks off with shepherd Rado.
In the nearby woods, Ã Â arlota experiences a drug trip, presumably caused by Mira's herbs, and witnesses witch-like people perform dances and orgies. Eventually she has sex with Rado. Helena runs into a dancing coven of naked women and is kissed by Mira, but gets overwhelmed and runs away, falling over the same cliff as Tamara.
The next day, Helena's brothers have gone missing and search parties are sent out. à  arlota realizes that Mira is Tamara, and they reconcile. Their mother hung herself before Mira returned home, having survived the fall. Otyla took Mira in, but she eventually got forcibly removed from her by locals. Mira was also the one who wrote the "mayor's" letter. When the sisters return to Mira's home (which used to be Otyla's), a badly wounded Helena is being carried by. à  arlota, a trained nurse, and Mira try to help the dying Helena. However, Anna and TomÃ¡à ¡ try to stop the sisters from touching Helena and yell for blessed salt. During the confrontation, Helena dies, and the sisters run back to à  arlota's cabin, followed by screams of accusations of being witches.
TomÃ¡à ¡ becomes convinced that à  arlota and Mira kidnapped his sons. Before à  arlota and Mira can leave, TomÃ¡à ¡, Anna and more locals arrive at the cabin. Mira is bound and à  arlota is tortured while the locals demand to know where the children are. Eventually, TomÃ¡à ¡ and other locals go outside to search while Anna interrogates the sisters. In the distance, Anna sees her children, runs after them, and gets mistakenly shot by a local. à  arlota manages to run away. TomÃ¡à ¡ returns, sees the wounded Anna, accuses Mira of being at fault, sets the cabin ablaze and leaves the bound Mira inside. à  arlota returns with Rado, rescues an unconscious Mira from the flames and attempts to resuscitate her.
Some time later, Mira and à  arlota run happily through a forest. They eventually undress, jump into a lake and swim.
The film generated positive reviews with an approval rating of 93% based on 15 reviews on Rotten Tomatoes.