midsummer nights dream

A Midsummer Night's Dream certainly rates highly as one of Shakespeare's great comedies. There is so much to this question. Check out the following link,

http://www.skyminds.net/english-literature/a-midsummer-nights-dream-a-comedy/

The question's slightly unclear; are you asking where there's an instance of a plot within a plot in a Midsummer Night's Dream?

If so then the play put on by Bottom and co. is likely to be the answer you're looking for.