Writer and philosopher Voltaire, loyal to his king, Louis XV of France, nonetheless writes scathingly of the king's disdain for the rights and needs of his people. Louis admires Voltaire, but is increasingly influenced against him by his minister, the Count de Sarnac.

• Warner Bros. Pictures
• George Arliss
• Margaret Lindsay
• Doris Kenyon
• Alan Mowbray
• Reginald Owen
• Theodore Newton
• Gordon Westcott
• Murray Kinnell