What happens
Prospero reveals to Miranda that they were exiled from Milan twelve years ago when his brother Antonio usurped the dukedom. He has orchestrated the tempest to shipwreck his enemies on the island. Prospero summons Ariel, his spirit servant, who reports the shipwreck's success. Prospero then encounters Ferdinand, the king's son, and Miranda falls instantly in love with him. Prospero pretends to distrust Ferdinand, charging him with treachery and binding him as a servant.
Why it matters
This scene is the narrative spine of the entire play. Prospero's long exposition—his account of usurpation, exile, and twelve years of magical study—gives shape to everything that follows. Miranda has lived in ignorance of her own identity and her father's history, a deliberate isolation that now ends. Prospero's choice to reveal everything at this moment is not random; he has orchestrated the tempest specifically because his enemies are near and his magical power is at its height. The revelation serves a double purpose: it explains why the storm was necessary, and it establishes Prospero as a man driven by both righteous anger and careful strategy. He has been waiting for the perfect conjunction of circumstances to act.
The arrival of Ferdinand and the instant attraction between him and Miranda introduces the play's emotional and romantic center, yet Prospero immediately complicates it by treating the young prince as an enemy. This is crucial: Prospero uses deception and magical constraint to test Ferdinand's worthiness, showing that even love and innocence are subject to Prospero's control and manipulation. Miranda's defense of Ferdinand—her insistence that he is noble and kind—goes unheeded by her father, who overrides her judgment. The scene reveals that Prospero's power extends over everyone on the island, and that he will use it to orchestrate not just political restoration but also his daughter's romantic future, all in the name of securing his dukedom and ensuring her advantageous marriage.