A covert investigator struggling with himself and his addictions. A commissioner who needs therapy. A criminal psychologist who is attracted to the commissioner. Drug dealers. Male escorts. A murdered prostitute. A strangled Polish caregiver. A psychopath who takes care of his mother. Islamists planning an attack. The domestic intelligence agency trying to prevent it. And the city where all of this unfolds. A city that allows everything to happen. For four seasons. And wonders. Simply wonders….