[5] Tina works for the Swedish Customs Service and uses her heightened olfactory sense to detect contraband, as well as human emotions such as guilt and shame.

One day at the border, Tina sniffs out a memory card containing child pornography, and her superior asks her to help with the subsequent investigation.

Tina accompanies the police when they search the apartment where the suspected pedophiles live and detects a camera with footage of an infant being sexually abused.

Tina is excited by her newfound identity and begins living more like a troll, finally mustering the courage to evict Roland.

Vore plans to use the hiisi as a changeling and is waiting to secretly replace a real human infant with the dying troll embryo.

John Ajvide Lindqvist wrote the first draft of the screenplay, and then Abassi hired Isabella Eklöf to add more "psychological realism" to the story.

To transform into the character of Tina, Eva Melander gained a considerable amount of weight and wore prosthetics that took four hours each day to apply.

Border screened at Cannes, where it won the 2018 Un Certain Regard award,[7] Telluride, and the Toronto International Film Festival.

[8] American actress Aubrey Plaza became such a fan of the movie that she held a private screening for about 60 of her friends, and promoted it during an appearance on the Conan talkshow.

The website's critics consensus reads, "Thrilling, unpredictable, and brilliantly acted, Border (Gräns) offers a singular treat to genre fans looking for something different.

"[11] On Metacritic, the film has a weighted average score of 75 out of 100, based on 25 critics, indicating "generally favorable reviews".

[12] Alissa Simon of Variety described the film as "an exciting, intelligent mix of romance, Nordic noir, social realism, and supernatural horror that defies and subverts genre conventions,"[13] and Stephen Dalton of The Hollywood Reporter wrote, "A couple of sharp curveball additions to Lindqvist's original plot also elevate Border beyond genre trappings and into stranger, sadder, more generally relatable territory.