Only a month after the events of "Center", Yegor Koshkin and his friends decided to get back to the Patomski Crater - just north-east of the Lake Baikal, on the border between the main Russian gold mining region and the diamond fields of Yakutia. They wanted to perform scientific research and measure the influence the crater on moral judgment and creative potential of people. Meanwhile, some other characters we met in the previous books of the...