What happens
Sebastian, a shipwreck survivor, meets Antonio, the man who rescued him from the sea. Sebastian learns he is in Illyria and plans to explore the city alone, fearing his bad fortune might endanger Antonio. Antonio, deeply devoted to Sebastian despite past enemies in this place, insists on following him anyway, offering his purse and promising to meet him later at the Elephant inn.
Why it matters
This scene introduces Sebastian and establishes the emotional foundation for the play's central confusion. Antonio's immediate and overwhelming devotion to Sebastian—whom he has known for only three months—mirrors the intensity of Orsino's love for Olivia and foreshadows Olivia's attraction to 'Cesario.' The scene reveals that attraction in this play operates on a logic of appearance and gratitude rather than knowledge; Antonio loves Sebastian partly for his physical beauty and partly for the chance to serve him, not because he truly knows him. Sebastian's reluctance to accept Antonio's help, grounded in superstition about his unlucky fate, creates dramatic irony: he fears burdening Antonio, yet by the play's end, his mere existence will cause chaos for everyone.
The scene also establishes Antonio as a man willing to risk himself, having enemies at court but choosing danger over separation from Sebastian. This dedication will later drive the play's central crisis in Act 3, Scene 4, when Antonio's arrest and desperate appeal to 'Cesario' (actually Viola) reveals the gap between who Antonio thinks Sebastian is and who he actually loves. The practical detail of the Elephant inn—where they will meet later—grounds the scene in commerce and routine even as the emotional stakes are unusually high. Sebastian's plan to see the city's sights before nightfall suggests he has no idea how long he will remain in Illyria or how profoundly entangled he will become.