King Alonso of Naples and his entourage are shipwrecked on an island after a tempest conjured by the magician Prospero, who seeks revenge on those who usurped his dukedom. Key characters include Prospero, his daughter Miranda, and the spirit helper Ariel, alongside the usurpers who face their reckoning. Ultimately, Prospero forgives Alonso and his companions, inviting them to stay before they return to Italy, marking a resolution to the conflict.