Master Class follows public-speaking-phobe Carson and his work friend Mickey into an acting class in a suburban strip-mall: the "Tom Perkins Acting Intensive," taught by emotionally-irresponsible former child star "Tomcat" Perkins. There, they contend with a never-was action idol, an escapee from children's theatre, and a predatory improv troupe, while they try to find Carson's courage, Mickey's heart, and Tomcat's sense of shame.