Rule 208: In the introduction of your essay, you should catch the reader's attention, provide an opening to your topic, and make your argument.
Your first sentence aims to grab the reader. You might offer a bold thematic statement or pose a question. Start with a bang, or your reader might decide to pursue other forms of entertainment.
The middle sentences name the author/playwright/poet and novel/play/poem/essay. They start to show what your bold beginning has to do with your specific and focused thesis.
The last sentence of your introduction poses a thesis. (You can read more about thesis statements in rule 210.)
Resources: UNC-Chapel Hill provides this great resource about how to write introductions.