The assistant stage manager of a small-time theatrical company is forced to understudy for the leading lady at a matinée performance at which an illustrious Hollywood director is in the audience scouting for actors to be in his latest "all-talking, all-dancing, all-singing" extravaganza.
In 17th-century France, Father Urbain Grandier seeks to protect the city of Loudun from the corrupt establishment of Cardinal Richelieu. Hysteria occurs within the city when he is accused of witchcraft by the sexually repressed Sister Jeanne.
Composer, conductor and teacher Peter Ilych Tchaikovsky struggles against his homosexual tendencies by marrying, but unfortunately, he chooses wacky nymphomaniac Nina, whom he is unable to satisfy.