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Olga Gavrilova and her young boyfriend Kirill come to the ski resort to celebrate the New Year, but due to a travel agency mistake they find themselves under the same roof with Olga's ex-husband Fyodor and his charming girlfriend Marinochka. A romantic New Year's weekend threatens to turn into a nightmare for both couples, so Olga and Fyodor decide to hide from their new passions that they were once married.