Wallander has become a grandfather and is trying to seize the role as good as it goes because he wants to be closer to his daughter Linda and her family. When Linda's father-in-law mysteriously disappears, Wallander is drawn into the case that takes him back in time to the Cold War and the submarine violations in the Stockholm archipelago. At the same time, he's starting to suspect that something is not right with him...

• Crime
• Thriller