Prospero uses magic to shipwreck his enemies on a remote island. He hopes to kill his brother Antonio and unite his daughter Miranda with Ferdinand. The play establishes relationships between Prospero and his slaves - the monstrous Caliban and the spirit Ariel. It also introduces Miranda and hints at her developing relationship with Ferdinand. Prospero controls the other characters through his power as a sorcerer and as the only father figure, representing colonial and patriarchal power dynamics.