Heiress Elizabeth Congdon and her nurse are murdered at Glensheen mansion in Duluth. In a sensational trial, Congdon's son-in-law, Roger Caldwell, is convicted of the murders. New evidence in the case sets him free a year later but incriminates his wife, Marjorie. Acquitted of these murders but found guilty in two arson cases, Marjorie is sentenced to serve time in an Arizona prison.