TheDukeofFromeJohnLangtonwithhiswife,theirbabybornaftercomplicationsduringchildbirth,adomineeringnanny,nurserymaidandvaletarriveatMontagueHallforLadyFelicia'sYuletideball.Duringtheeveningthebabyistakenfromhiscot.InspectorMallorysuspectsaninsidejobbythevaletwhenhissecretwifearriveswhileBrownismoreinterestedinthebirth...
