A group of heroes assembled by the eccentric billionaire goes into closed Perimeter full of abnormal activity which is inexplicable in terms of science. This journey will change all members of the group and reverse their notion of reality.

The plot is reminiscent of a fairy tale, when the husband goes sailing, and as a farewell, the wife ties a thread to his button so that she knows where her beloved is.

Three children and their parents set off on an unforgettable family adventure - a hiking trip to the mountains on the territory of the Divnogorye Museum-Reserve in the Voronezh Region.