When Katarina Huss starts as an aspirant, she is met with skepticism from colleagues, as her mother Irene is deputy police chief. At the same time, a young boy who is a witness in a murder investigation disappears.
When the evidence is too weak to convict a known wife abuser, Katarina's loyalty to her colleagues is put to the test. How far is she willing to go to become one of the team?
A wave of burglaries hits Gothenburg's finer areas. During a patrol, Katarina and Robert are taken hostage when they surprise the violent robbers at a family's home.
Katarina infiltrates a group of drug dealers and gets in touch with a young woman who sells drugs. As their friendship grows, Katarina finds it difficult to separate her professional role and her private self.
An assassination attempt on a colleague is first considered to be due to his connection to the underworld, but Katarina eventually realizes that it is a desperate way to hide what really happened during the riots.
