"The Spectre of Sanguine Isle" is an adventure included in the product "Calpurnia's Guide to Practical Traps". It's an adventure that features traps from the document. The isolated town of Cupidinum has been shaken by a senseless murder. The culprit has fled to Sanguine Isle, and it's up to the heroes to find him and bring him to justice. But the fugitive doesn't want to be caught, and he knows a thing or two about guerilla warfare. Can the heroes catch their elusive prey? And was his crime quite as straight-forward as it was made out to be?