Swanilda and her friends find themselves in a large room filled with people, but these people aren't moving. The girls discover that these are not people, but life-size mechanical dolls. They quickly wind them up and watch them move. In her searching, Swanilda finds Coppélia behind a curtain and discovers that she, too, is a doll.
When Dr. Coppelius returns home, he finds the girls in his house. He becomes angry not only for getting into his house, but for also messing up his workroom, and kicks the girls out. Dr. Coppelius begins cleaning up the mess and notices Franz coming into the window. Instead of shooing him away, he invites him in. Dr. Coppelius wants to bring Coppelia to life and in order to do that, he needs a human sacrifice. His magic spell will take Franzs life and transfer it to Coppélia. Dr. Coppelius gives Franz some wine laced with sleeping powder and Franz begins to fall asleep. Dr. Coppelius then readies his magic spell.
When Dr. Coppelius kicked the girls out, Swanilda stayed and hid behind a curtain. Swanilda dresses up in Coppelias clothes and pretends to come to life. She wakes up Franz and quickly escapes by winding up all of the mechanical dolls. Dr. Coppelius becomes saddened to find a lifeless Coppélia behind the curtain.
Act III
Swanilda and Franz are about to say there vows when the angry Dr. Coppelius shows up. Feeling badly for causing such a mess, Swanilda offers Dr. Coppelius her dowry in return for his forgiveness. Swanilda's father tells Swanilda to keep her dowry. He pays Dr. Coppelius instead, because it was a special day. Swanilda kept her dowry and Dr. Coppelius was awarded his own bag of money. Swanilda and Franz get married and the entire town celebrates by dancing.

