A “play within a play”, CURTAINS with music and lyrics by Broadway legends Fred Ebb and John Kander (Cabaret and Chicago), takes place backstage at Boston’s Colonial Theatre in 1959.  It’s the opening night of “Robbin’ Hood of the Old West” and the new musical could be a smash hit, if it weren’t for the show’s incredibly untalented leading lady.  When she is murdered during the curtain call, Lieutenant Frank Cioffi is summoned to conduct an investigation.