Here is abit more about "Noises Off" play.
The plot for Noises Off is simple - a play upon on the concept of a play within a play, which in this case is a dreadful sex-comedy titled "Nothing On". This is the sort of play in which young girls run about in their underwear, old men drop their trousers, and many doors continually open and shut. "Nothing On" is set in "a delightful 16th-century posset mill" that has been converted to a modern dwelling for which renters are solicited; the fictional playwright is appropriately named Robin Housemonger. Each of the three acts of "Noises Off" contains a performance of the first act of "Nothing On"