A camp of scientists in the middle of the frozen expanse of Lake Baikal. The depth under the tent is over a kilometer and a half. Work goes on day and night. At night, the ice in the camp glows with extraterrestrial colors as robots work underwater. The breath-taking goal of the scientific research is to unravel the mystery of the giant ice rings which have been arousing genuine interest among scientists from all over the world for decades. And yet, this is not fiction; everything here is real, and the efforts of these enthusiasts are sure to be rewarded with new discoveries. We are creeping closer and closer to the solution of one of Lake Baikal's mysteries.