Timber trucks explode in Karelian forests. Someone clearly wants to disrupt the supply of timber abroad... Criminal groups involved in this business are on the brink of war. Who will help avoid a showdown? Of course, he is the famous “Sherlock Holmes” of our days - “detective in law” Sergei Kazakov. It is he who is tasked by his boss to find out who is behind the forest, “green” terror. The murder of Finnish television journalists puts the detective on the trail. But who is covering for the “green” terrorists: environmentalists? sectarians? drug dealers? Or do the threads lead even further – to foreign customers? Local boys, St. Petersburg brothers, special services and the clever journalist Alena help Sergei unravel this case.