In the middle of the circle

When the head of a steel company is found dead in his burning BMW in a field near Uppsala, the police quickly close the case as a tragic accident. But soon another case will appear, which resembles the first in many ways, and Inspector Eva Nymanová receives a letter, which mentions details about the next, a much worse attack, which is yet to happen. Eva Nymanová begins to suspect that both deaths are somehow connected and that the attacker is probably motivated by the fight for environmental protection.
At the head of the Nova investigation group, Nymanová sets out not only on the trail of a mysterious murderer, but also on a journey into the past, which she already considered closed. However, if he is to prevent another assassination, he must find out as quickly as possible who is behind the whole matter. But investigators only have mysterious letters and a strange symbol from the crime scenes: circle within a circle…