The video shows a cartoon mouse wearing glasses and a bowtie, sitting at a desk with a flask of green liquid, a Bunsen burner, and other lab equipment. He is seen pouring the liquid into the flask, lighting the Bunsen burner, and then reacting with surprise as the liquid turns purple. The mouse's facial expressions change from focused to shocked as the experiment progresses. The background shows a purple cat sitting in a green chair, watching the mouse's actions.