The film stars Auðunn Blöndal, Egill Einarsson, Björn Hlynur Haraldsson and Steinunn Ólína Þorsteinsdóttir.

[3][4] The film is based on a fake movie trailer made by Auðunn, Hannes and Sverrir Þór Sverrisson for a TV show in 2011.

The trailer featured Gísli Örn Garðarsson, Hjalti Árnason, Ingvar Eggert Sigurðsson, Hörður Magnússon and Hermann Gunnarsson.

[1] A cop (Auðunn Blöndal) in denial of his sexuality, falls in love with his new partner (Egill Einarsson), while investigating a string of bank robberies where nothing seems to have been stolen.

[6] Böðvar "Bússi" Böðvarsson, a cop who doesn't play by the rules, is partnered with Klemenz, a straight shooter, as they investigate a series of bank robberies in Reykjavík where nothing appears to have been stolen.

During the latest robbery, a woman on a motorbike flees the scene, leading Bússi to take chase.

They chase the woman through the streets of Reykjavík, including through a shopping mall, before she escapes to the nearby town of Garðabær.

After Bússi's chief Þorgerður disciplines him for causing $700 worth of damage during the failed chase, he goes home to his girlfriend Lilja, but they fight due to how distant he has been to her.

The two cops momentarily touch hands and share a moment, before the last gang member takes a woman hostage.

Bússi and Hörður go drinking together and discuss the robberies, before they begin kissing passionately in the bathroom of the bar.

Bússi and Hörður manage to find the gang at their next heist, but the only member they capture is killed when Stefanía detonates an explosive to destroy evidence.

Discovering a burnt USB drive in the bag he was holding, the two cops take it to a local hacker Loa.

Loa discovers that the virus on the USB stick is designed to crash all the security systems throughout Iceland, and informs Bússi.

After a drunken night in Reykjavík, Bússi realises that the football game was the cover and manages to jump onto the back of the garbage truck.

Once they arrive at the factory, Bússi locates Hörður, who informs him that Rikki has kidnapped his brother Maggi and is holding him hostage.

At the factory, Klemenz is arrested and Þorgerður decides to merge the two police departments together, making Bússi and Hörður partners permanently.

Stefanía appears, running at the group, but Þorgerður drops the shipping container full of gold on top of her.

[12] Cop Secret grossed 76 million ISK (about $588,651) only in Iceland in 2021,[2] coming in second in the box office behind No Time to Die.