Elmer Fudd is out hunting rabbits - Bugs Bunny in particular. When Bugs runs for cover, the two of them end up going in the stage door of a local theatre. With Fudd training the shotgun on him at all times, Bugs is forced to perform to avoid being shot.
With a title that sounds like it was a working title rather than a title meant to be used as the real title; certainly it isn't anywhere near the usual puns and such - and if you are able to remember the film Stagedoor Canteen, then you likely won't be watching this! The film starts out appearing to be an early Bugs in the way that he is quite slimly drawn and smart mouthed without too much of the later stuff. As an early Bugs (I assume!) this is OK but it is hardly the best example of Bugs' talents.
The material is a little weak and isn't really as funny as it should have been - certainly we have seen much better cartoons that involve Bugs and Elmer on a stage of some sort. The conclusion to the film is daft and not very funny - although the sheriff appears to be a first draft of Yosemite Sam.
Overall, this has the basic elements of Bugs that we all love but there are plenty of shorts of his that use the basic premise much better than this one.