An aspiring singer unwittingly comes into possession of several tapes for which her engineer husband and his partner, in their electronic eavesdropping business, were murdered, and discovers that she and her daughter are now being stalked by the killers.
Miss Moffat (Bette Davis), una inglesa que va a vivir a un pequeño pueblo galés, descubre que los niños trabajan en las minas. Impresionada por esta situación, decide escolarizarlos. Adaptación de la obra de Emlyn Williams. En 1979 el maestro George Cukor dirigió otra versión protagonizada por Katharine Hepburn.
