The Magic Flute by Wolfgang Amadeus Mozart.

After being chased by a serpent, Prince Tamino falls unconscious. Three ladies enter and kill the snake. Tamino comes to, assuming the snake was killed by Papageno, a bird catcher, who has just appeared. When Papageno does nothing to disabuse this misapprehension, the three ladies reappear and padlock his lips to stop him lying anymore. They show Tamino a portrait of Pamina, the beautiful daughter of their mistress, the Queen of the Night. Pamina, they tell him, has been kidnapped by the evil magician Sarastro. The Queen appears and asks the love struck Tamino to rescue Pamina. He agrees and sets off with Papageno, whom the ladies have freed and given a magic set of bells. They also give Tamino a magic flute. Pamina is being guarded by the villainous Monostatos, who is trying to seduce her when Papageno enters. Frightened, Monostatos runs off, leaving Papageno to tell Pamina that her rescuer is close by.

Three boys lead Tamino through Sarastro’s realm to three temple doors. He is twice turned away; at the third door, a priest greets him and reveals the Queen is the evil one from whom Sarastro was trying to save Pamina. Tamino leaves to find Pamina; a moment later, she and Papageno enter, chased by Monostatos. Papageno saves them by playing his magic bells. Sarastro arrives and declares Pamina is free to marry but not to return to her mother. Tamino is brought in by Monostatos, who demands a reward from Sarastro, who punishes him instead.

Sarastro tells the priests Tamino will undergo initiation rites. Monostatos tries to kiss the sleeping Pamina but is surprised by the Queen of the Night. The Queen gives her daughter a dagger, ordering her to murder Sarastro.
Sarastro finds the desperate Pamina and consoles her, explaining he does not want vengeance. Tamino and Papageno are told they must remain silent and not eat, a vow Papageno breaks when he accepts some water from a flirtatious old lady. She vanishes when asked her name. The three spirits appear to guide Tamino and tell Papageno to be quiet. Tamino remains silent even when Pamina appears. Misunderstanding this for coldness, she is heartbroken.
Tamino has only two more trials to complete. Papageno longs for a wife instead. He eventually settles for the old lady, who turns into a beautiful young Papagena but then disappears.

Pamina and Tamino are reunited and face the ordeals of water and fire together, protected by the magic flute.
Papageno tries to hang himself but is saved by the three spirits, who remind him his magic bells will find him true happiness. When he plays the bells, Papagena appears. The Queen of the Night, her three ladies, and Monostatos attack Sarastro’s temple but are defeated and banished. Sarastro blesses Pamina and Tamino as all join in hailing the triumph of courage, virtue, and wisdom.