I saw Sebastian trying to keep afloat by tying himself to a broken mast
Orsino is telling his servant, Valentine, about his love for Olivia. Valentine reminds Orsino that Olivia is mourning the supposed death of her father and brother and that Orsino's love is not reurned.
Viola speaks with the captain whose crew has just rescued her from a shipwreck. Although Viola was found and rescued, her brother, Sebastian, seems to have vanished in the storm. The captain tells Viola that Sebastian may still be alive.