In a small town people arrange traditional Harvest festival. The city mayor comes to the square. A big sheaf of wheat, a symbol of celebration, is set in the center of the square. The foundry workers have prepared a wonderful present for the festival – a pleasant-sounding giant bell. The youth is eagerly waiting for the celebration and fun, especially Swanhilde and Franz, they are getting married and want to celebrate their wedding on the day of the city festival. But Swanhilde is jealous. She has recently noticed that Franz is infatuated with the mysterious stranger who lives in the house of Coppelius. The beautiful girl often sits at the window and reads a book, but never goes out. That is why young men constantly roam under her balcony, hoping to see her beautiful face, but Coppelius drives them out like mischievous schoolboys.
One day Coppelius loses the key. Swanhilde finds it and has an idea to meet Coppélia. She and her friends decide to enter Coppelius’ house. Meanwhile, Franz develops his own plan to meet Coppélia, climbing a ladder to her balcony.
Swanhilde and her friends find themselves in a large room filled with moving dolls. Swanhilde also finds Coppélia behind a curtain and discovers that she is a doll too.
Girls wind the dolls up and dance with them. Suddenly Coppelius returns.
Friends of Swanhilde run away, but the young girl stays in the house and tells Coppelius about her visit and Franz treachery. The old craftsman feels sorry, so he suggests to play a trick on Franz and teach him a lesson. Coppélius invites Franz into the house and offers him some wine. Meanwhile he dresses Swanhilde in the dress of the doll and then introduces Franz to Coppelia. Franz is disappointed, so he has been intrigued by the doll. Coppelius promises to revive Coppelia, but Franz doubt it. The doll starts moving and Franz asks permission to marry her. Now his treachery is obvious. Swanhilde reveals herself and Franz regrets about his insincerity. The old craftsman tries to reconcile young couple.
Citizens are celebrating Harvest festival and the new bell is presented. Swanhilde and Franz are about to make their wedding vows. City mayor, Coppelius and other citizens wish them long-lasting happiness, eternal love and prosperity. Coppelius presents his mechanical doll Coppelia. He winds her up and the doll begins to dance. Everybody admires his craftsmanship, so Coppelius decides to present all his dolls to the citizens.