Anna Pihl's first day at Bellahoj police station is anything but boring as she learns what it takes to work in the most populated and busy police district.

Anna's partner is still in the hospital and she is assigned a rule bound partner, Kim, known as KGB.

A homeless man is found badly injured after an apparent suicide attempt, but an eye witness has a completely different version.

On their way home from the movies, Anna and Daniel are attacked by four teenagers. The police believe it to be a happy slapping, where youths attack strangers and record the prank.

A boy disappears at the zoo.

Anna Pihl has offered to be a plain-clothes decoy in the attempt to catch the murderer, and her colleagues back her up in this dangerous operation; Anna's father believes that the police are underestimating the intelligence of the murderer.