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.
A body is found at a cash point, the apparent victim of a heart attack. Two teenage girls are arrested for the brutal murder of a cab driver. The girls confess to the crime, showing no remorse. Two open and shut cases.
At first these two incidents seem to have nothing in common, but as Wallander delves deeper into the mystery of why the girls murdered the cab driver, he begins to unravel a plot much more involved complicated than he initially suspected. The two cases become one, and lead to a conspiracy that stretches beyond the borders of Sweden.