Adelgitha; or, The Fruits of a Single Error is a gripping Gothic tragedy by Matthew Lewis that explores the harrowing tale of a fallen woman subjected to the merciless blackmail of a tyrant after rejecting his advances. Set against the backdrop of High Middle Ages Otranto, the play features fictionalized historical figures, immersing listeners in a world of treachery, murder, madness, and despair. Its themes of power, manipulation, and the consequences of a single misstep resonate profoundly today, reminding us of the vulnerabilities individuals face in the hands of ruthless authority.