The Repertory Theatre of St. Louis

(Courtesy The Repertory Theatre of St. Louis)

The Repertory Theatre of St. Louis opens tonight with Michael Hollinger's “Opus,” the story of a famous string quartet who must replace one of their members in time to perform for the White House. Director Brendon Fox described the quartet as a family of sorts, making the play relatable even to someone who doesn’t know much about classical music.