A plot synopsis is a brief summary or outline of the events that make up the storyline of a book, movie, play, or other narrative work. It provides an overview of the main characters and their actions, as well as any major conflicts or themes present in the story. A good plot synopsis can give readers or viewers an idea of what to expect from a particular work without giving away too many details, allowing them to make an informed decision about whether they want to experience it for themselves.