Light Up The Sky is Moss Hart's delightful 1940's comedic tribute to New York theatre-folk. At the Boston tryout of a new Broadway show, the lead actress, the backer, the director and several others, are all in seventh heaven anticipating a tremendous success with the earnest and experimental work of a young unknown writer. Gathered in a hotel room, they prepare for their big Opening Night with tremendous gusto and many exhibitions of temperament. Following the play's first public performance however, the cast, director and backer believe it a flop. Instantly they turn against themselves, the production, and the author and savagely proceed in what looks like an attempt to destroy themselves and all their former hopes and dreams for their show.