Midsommar (2019)

 is a 2019 horror film directed by Ari Aster.

Psychology student Dani Ardor is left traumatized after her bipolar sister Terri kills herself and their parents by filling their home with carbon monoxide from car exhaust. The incident strains Dani's already difficult relationship with her emotionally distant boyfriend, cultural anthropology student Christian Hughes. Several months later, she learns that Christian and his friends Mark and Josh have been invited by their Swedish friend Pelle to attend a midsummer celebration at his ancestral commune, the Hårga, in rural Hälsingland. The celebration occurs once every 90 years and Josh, also an anthropology student, wants to write his thesis on European midsummer festivities. Christian has hidden the trip from Dani, wanting to break up with her before leaving, but invites her along after she finds out about it, although he does not think she will actually come.

Upon arrival, they meet Simon and Connie, an English couple from London who have been invited by Pelle's communal brother Ingemar. He offers the group psychedelic mushrooms, and Dani has a bad trip, visualizing her deceased family. Pelle gives Dani a picure for her birthday; Pelle later reminds Christian of the date. The day after their arrival, the group witnesses an ättestupa; where two elders commit suicide by jumping from a nearby cliff onto a stone platform. When one of the elders survives the fall, the commune members mimic his wails of agony and crush his skull with a mallet. Commune elder Siv attempts to calm Simon and Connie who are horrified and confused, explaining that it is what every member of their community does once they reach the age of 72, in order not to become a burden to the community which comes with ageing.

Christian also decides to write his thesis on the Hårga, angering Josh. Disturbed by the ättestupa, Dani attempts to leave, but Pelle convinces her to stay, explaining his own connection to the community after he was orphaned when his parents died in a fire, and questions whether she feels loved by Christian. Connie decides to leave, but cannot find Simon. She is informed by one of the Hårga that he has been driven to a nearby train station and she will be brought to him when the driver returns. After unwittingly urinating on an ancestral tree, Mark is lured away by Hårga member Inga. That night, Josh secretly photographs the commune's sacred runic texts after being refused by the elders. He is interrupted by someone wearing a skin mask of Mark's face, then is bludgeoned and dragged away.

The next day, Dani and Christian are informed that Mark and Josh are missing along with a sacred text. Dani is given Hårga clothing along with a hallucinogenic drink before participating in a dancing competition; she wins and is crowned May Queen. In so doing Dani is welcomed as a new member of the Hårga. At the same time, Christian is drugged and inducted into a sex ritual designed to impregnate Maja, a young female member of the Hårga, while older naked female members watch and mimic Maja's moans. Discovering this, Dani has a panic attack; the commune's younger women surround her, mimicking her cries. After the ritual, Christian comes to his senses and tries to flee. He discovers Josh's leg planted in a flowerbed and Simon's body turned into a blood eagle in a barn, before being paralyzed by an elder who blows a powder of crushed psychedelic mushrooms on his face.

The commune leaders explain to Dani that, to purge the commune of its evil, nine human sacrifices must be offered. The first four victims are outsiders lured to them by Pelle and Ingemar, while the next four victims must be commune members. As the May Queen, Dani must choose either Christian or a local villager to be the final victim. She chooses Christian, who is stuffed into a disembowelled brown bear's body and placed in a triangular wooden temple alongside other sacrifices, including Connie, who appears to have been drowned. It is set on fire and the commune members mimic the screams and wails of those being burned alive. Dani initially sobs in horror, but gradually begins to smile.