Naked Irina Cherichenko kneels(0:36)

A strain of a disease atypical for the area—West Nile fever—has been discovered in a Karelian village. The head of the Research Institute of Virology sends epidemiologists-virologists Vera Boyko and Nikolai Romanov on reconnaissance. They are connected by a difficult past, and it is difficult for them to agree to a joint business trip. While searching for the source of the virus, Vera and Nikolai discover symptoms of a deadly disease. When she suddenly retreats on the strange island of Sariola, the difficulties are just beginning. Scientists will have to unravel the mystery of this place, comprehend the difficult rules of survival among its inhabitants, understand their relationships that ended many years ago, and find a way to return home, because when they try to escape, the symptoms of fever return.