As a stagehand in a vaudeville theatre, Buster dreams of a performance in which he plays all the numbers and is also his own orchestra and audience. After the rude awakening in the coulisse, the game of doubles and deceptions continues with a pair of twins, two doors and mirrors until the worker is really forced onto the stage because the star of a chimpanzee act has escaped. The ongoing troubleshooting culminates in the rescue of a drowning underwater acrobat.