The narrator's friend saw a man throwing starfish that had washed ashore back into the ocean. When the friend asked what he was doing, the man explained he was saving the starfish from dying out of water by throwing them back to the sea. Though there were many starfish, the man felt his small efforts made a difference to each individual starfish he saved. His actions reflected that everyone can help others through small acts and change doesn't need to be on a large scale to be meaningful.