The Three Geeks mistakenly turn Buffy invisible. The Slayer takes some advantage from going unseen. Willow has to do the detective without using magic, while Xander finds Spike doing some weird physical training.
When Buffy gets a job at the Doublemeat Palace, a local fast-food restaurant, she begins to believe that disappearing co-workers and the secret ingredient to the restaurant's hamburger may be connected.
After Buffy is stung by a demon, she begins to have vivid day-dreams about a mental asylum. She gradually begins to believe that she is a crazy girl back in L.A and that Sunnydale and all her friends are just a figment of her imagination.