Generally considered one of Shakespeare's problem plays, Measure for Measure examines the ideas of sin and justice. Duke Vincentio turns Vienna's rule over to the corrupt Angelo, who sentences Claudio to death for having impregnated a woman before marriage. His sister Isabella, a novice nun, pleads for her brother's life, only to be told that he will be spared if she agrees to relinquish her virginity to Angelo. (Summary by wildemoose)