Nathanael falls for the automaton Olimpia
Nathanael, a student still haunted by the childhood memory of the lawyer Coppelius (whom he identified with the eye-stealing Sandman and blamed for his father's death), buys a spyglass from the barometer-seller Coppola and through it sees Professor Spalanzani's 'daughter' Olimpia come alive. He falls obsessively in love with her, abandoning his fiancée Clara, even though Olimpia only answers 'Ah, ah!', dances with mechanical rigidity, and has a cold hand.