Investigating a series of murders and kidnaps, 'A' Unit begin to suspect they are linked to a shared high school experience.

A woman is found collapsed in the street, having escaped from an unknown basement. She has no idea why she was kidnapped and, with nothing else to go on, 'A' Unit follow a lead found in the basement to a drugs ring run by two brothers.

The explosion is powerful and the devastation enormous when a subway train explodes in Stockholm's tunnel system on a November night. The country is in shock. A group calling themselves "The Holy Riders of Siffin" claim responsibility for the attack in an anonymous call that the A Unit manages to trace. They think they are close to an arrest. What they don't know is that this is just the beginning of a hunt framed by political extremism, hate and death. (Part 2)

The explosion is powerful and the devastation enormous when a subway train explodes in Stockholm's tunnel system on a November night. The country is in shock. A group calling themselves "The Holy Riders of Siffin" claim responsibility for the attack in an anonymous call that the A Unit manages to trace. They think they are close to an arrest. What they don't know is that this is just the beginning of a hunt framed by political extremism, hate and death. (Part 1)

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. (Part 2)

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. (Part 1)

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. (Part 2)

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. (Part 1)

A series of brutal murders of Polish women hiding out in Sweden is the new A Unit's first assignment. The victims turn out to be key witnesses in a big case against the Polish mafia. Three of them are found murdered within a couple of days, and two are missing. The hope is that the missing women are still alive. Chief Inspector Kerstin Holm gets the case, and the hunt for a ruthless murderer and his shady victims begins. (Part 2)

A series of brutal murders of Polish women hiding out in Sweden is the new A Unit's first assignment. The victims turn out to be key witnesses in a big case against the Polish mafia. Three of them are found murdered within a couple of days, and two are missing. The hope is that the missing women are still alive. Chief Inspector Kerstin Holm gets the case, and the hunt for a ruthless murderer and his shady victims begins. (Part 1)