一名男子被发现吊死在树上，同时在斯卡恩斯动物园的狼群围栏里也发现了一具尸体。另外，有五名女孩试图逃离瑞典。

这是根据阿恩·达尔（Arne Dahl）的瑞典犯罪小说改编的戏剧化作品，开篇是一部两集惊悚剧。一连串的谋杀案促使CID（刑事调查局）督察珍妮·霍尔廷（Jenny Hultin）组建了一个侦探小组，以期在更多人遇害并引发全国恐慌之前将凶手缉拿归案。与此同时，小组成员之一保罗·耶尔姆（Paul Hjelm）曾开枪射击一名人质劫持者，在他设法……之后，得以避免一场纪律听证会。

A brutal attack leads 'A-Unit' to a stash of steroids linked to an organisation Interpol have been investigating. A series of related kidnaps and murders show apparent links to a shared high school experience.

Two Swedish girls have been found dead on the outskirts of Brussels. The circumstances surrounding their deaths point to a vicious trafficking operation and the Swedish branch of the Black Hearts motorcycle gang. When another girl disappears from the same area, A Unit sees a shocking pattern. Shortly thereafter, a suspected kidnapper is found brutally murdered and the connection to Black Hearts becomes even more puzzling. Is someone else behind it? The missing girl's fate now rests entirely in A Unit's hands.

An American serial killer is on board a plane from New York to Stockholm. Without a proper identification and with great urgency A-group try to locate this passenger before Sweden inadvertently imports it's first American serial killer. The serial killer enters Sweden, and very soon he begins his killing spree. His methods are blood thirsty and can be traced back to the Vietnam War. A collaboration with the FBI begins in an desperate attempt to catch him.

The explosion is powerful and devastation total when a T-train explodes in Stockholm's subway system, one night in November. The country is in shock but when some who call themselves "Siffins Sacred rider" takes the blame in an anonymous call to the A group manages to trace, so it is believed to be close to an arrest. What police do not know is that this is only the beginning of a hunting bordered by political extremism, hatred and death.

Early one morning, a bank office in the middle of Stockholm is hit with a violent robbery. When the police storm the premises, the robbers have vanished without a trace. The event mystifies the A Unit who, under the supervision of US Intelligence, takes the case. When they find a strange hiding place inside one of the bank's walls, with traces of secrets from the days of the Cold War, it soon becomes clear that the bank robbers are just pawns in a larger game. A game that will soon claim more victims.

TV Mini-Series

Group A are called in to investigate a car bomb in Holland but to their horror a policeman and his family were in the car. Further investigation reveal a link between drugs and child porn so can Group A make the required connection before its too late.

Kamal, a young Iraqi man entering Europe on foot through the border between Turkey and Bulgaria, is captured by Bulgarian border police but escapes, finding himself to search for a way out in a seemingly interminable forest, an underworld where rules and laws don’t exist, where he is wounded and chased by Bulgarian migrant hunters. For three days and three nights Kamal must fight for his life through a journey of survival until a final life-or-death confrontation.