The cast is expecting a special guest of some kind, be it a long lost relative, a critic who's come to review the restaurant/hotel/nightclub/what have you everyone works at, or even a celebrity. The thing is, the cast isn't sure what they look like or who to expect, and end up mistaking someone else for this guest. Whether intentional or not, the impostor wastes no time in taking advantage of the situation, demanding preferential treatment and leaving the other characters hopping to please them. Sometimes the fraud is exposed and sent packing, while the real guest shows up just in time. More often, however, there are some consequences for the cast, whether it's the real guest showing up after getting mistreated, or the fraud not leaving until he's milked the cast dry.