In 1950s Copenhagen, Jens is a law student with a part-time job in a law firm. He lives at home and is more or less engaged to Lis. Jens' life is very regular and organized until he meets slightly older Erhard, a head clerk at the firm. Erhard lures Jens into the mysterious city nightlife, and from now on, Jens' life changes. The engagement is broken off and his education is neglected.

A serial killer who slaughters campers is on the loose in Sweden. The lead detectives make a breakthrough when the killer, a cloaked figure wielding a sword and a strange mask, sends the police a video recording.

A botched burglary leads to the arrest of the Jönsson gang’s leader, Sickan. After serving ten months in prison, he is released and unexpectedly recruited by the enigmatic banker Wall-Enberg Jr. to steal the legendary Bedford Diamonds in Switzerland. Though Sickan successfully carries out the heist, he is betrayed and nearly captured. Returning to Sweden and reuniting with his old accomplices, he sets out to take calculated revenge on the man who double-crossed him.