For Josh Harper, being in show-business means everything he ever wanted - money, fame, a beautiful wife, a lead role on the London stage. For Stephen C. McQueen, on the other hand, it means a disastrous career playing passers-by and dead people. He's stuck with an unfortunate name, a hopeless agent, a daughter he barely knows, and a job as understudy to Josh Harper, the 12th Sexiest Man in the World. And things get even more difficult when Stephen falls in love with Josh's clever, funny wife Nora. But might there yet be a way for Stephen to get his Big Break? The Understudy is a scintillating comedy of ambition, celebrity, jealousy and love.