Lucas, a diamond trader who travels to Saint Petersburg to arrange a sale, discovers that his Russian business partner has left his hotel and gone to a small Siberian village, so Lucas also heads there to try find him.
The matriarchal clan led by gorgeous Margarita enters a turbulent period when her son loses his beloved fiancée. Using the structure of a repetitive ritual, the action spans years but takes place mostly during the annual gatherings of Margarita's extraordinary family in their mansion on New Year's Eve. Margarita believes in the magical 13th hour that can break the eternal circle of repetition, defeat death and bring her much-awaited love.
