The Ek siblings have gone limping on with their lives. They have little or no contact with each other anymore and when they do meet for the first time, they are subjected to a dramatic assassination attempt.
On the annual day of Sonja's death, her children are attacked and the hunt for the villains begins.
Emil suspects that the attack on the siblings may be linked to his witness. Gustav, Nina and Linus try to find out who is responsible and eventually they get a lead. But what they don't know is that someone else is one step ahead.
As the threat to the siblings grows, a guest from the past shows up at Gustav's house. Nina is forced to work with Barry's dodgy business associates to keep the firm afloat. But something goes wrong.