After much hesitation workers of the farming cooperative «White Sands» challenge the kolkhoz «Dawn of Victory» to a socialist competition. The kolkhoz has won the red banner in the district for the fourth consecutive year. The milkmaid Varvara asks old Uliana, the best witch in the village, to cast a spell on her cows. In the meantime Zinka, the granddaughter of the chairman of the kolkhoz, pleads with her grandfather to make her a milkmaid. Zinka shows excellent results and her kolkhoz gets the banner. The «miracle woman» is summoned to Moscow to take part in the congress of shock-workers.