After going through strict selection and a course of special training, Oleg Shorokhov is accepted into the Unified Control Service that tracks unauthorized movements along the Time Trunk.
Now he is an operative of the Shorokhov division โ a man without a past. His job is to protect the present from criminal actions by aliens from the future who are trying to change their fate by making adjustments to the past.
His routine task is to restore cause-and-effect relationships that have been disrupted by outside interference. However, soon Shorokhov realizes that the Time Trunk is not a straight road at all, but a winding path, with every turn calculated in advance by someone else.