Adelgitha; or, The Fruits of a Single Error, the second tragedy by Gothic writer Matthew Lewis, explores the harrowing tale of a fallen woman who faces relentless blackmail from a tyrant after rejecting his advances. Set against the backdrop of High Middle Ages Otranto, the play intertwines fictionalized historical figures like Robert Guiscard and Michael Ducas, delivering a gripping narrative filled with treachery, madness, and despair. Though not the most polished work, its themes of power, manipulation, and the consequences of a single error resonate powerfully today, reminding listeners of the timeless struggles against oppression and the complexities of human morality.