Firewall

A man enters the bank with something resembling a bomb around his neck. He demands that money is transferred into an account, or he will blow up the bank. The man is known as the village idiot, and claims that Sitting Bull is his father. No one take the case to seriously until they find that the bomb is real. Is the village idiot acting on his own, or are there more people involved? A long and complicated investigation is started by Kurt Wallander and his colleagues.