The assignment is far from done. Commenters here, including myself, gave ideas for situations -- Bipolar vampire, vegetarian vampire, etc. That does not make a plot. The DD will still have to come up with a storyline, write a script, memorize the lines, rehearse, put together any costumes and props, and perform it. I don't see anything wrong with asking for ideas to help spark your imagination for a project that leaves you uninspired. (Frankly, IMHO, this sounds like a really dumb project that, unless it's for a performing arts class, seems like a waste of time, especially at the high school level. I'd be uninspired and asking for ideas too.)