Alex thought he had figured it all: a loving family, a successful career in the Stockholm police force… and some extra cash doing small jobs for the local mafia. But when his co-detective and partner in crime gets killed in shady circumstances, the whole edifice of Alex’s life starts to fall apart. Put under internal investigation, Alex tries to cut its ties to the mafia but things don’t go as planned. They kidnap his son to force him to do one last job: unmask a police snitch in their ranks. With everything against him, Alex must find a way to get his life back.
Alex is in prison with heavy criminals like Haze, the leader of a large criminal network. Frida asks Alex to infiltrate the network in exchange for previous release, but who can he trust?
Alex has a leave from prison, but must devote it to getting through a coke deal with the labile Samson. But the drug deal is not Samson's only mission, he should also murder the key witness that Frida is searching for.
Samson's attitude puts it on, and Alex must save the drug deal before he both gets angry with Haze and loses his chance of early release. An old enemy pops up and complicates things.
Alex forms an unlikely alliance and tries to repair his marriage before returning to prison. Simon tries to help Bobby leave the criminal path, but she involuntarily pulls in deeper.
Frida realizes the police corruption that characterizes BG and the Executioner's gang war, and that both she and Alex have been fooled. When she tries to explain it to him, he acts in desperation.