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 gang of drug smugglers but finds it hard to separate her career role from her private life.

An attack on a colleague leads Katarina to seek out the truth of what happened during the riots. The trail leads straight to her own police squad.