The circus has come to town! But rather than herald a time of festive joy and exotic entertainment, this normally wondrous event instead heralds a sudden rash of violent murders. The victims bear the unmistakable mark of talons on their savaged bodies - and it just so happens that this circus has among its exhibits numerous creatures capable of inflicting such wounds, not the least of which a mysterious sphinx. Desperate for aid in a town that's forbidden them to leave before an opportunity for justice presents itself, the carnies turn to adventurers for aid - can they find the culprit before the murderer finds them? This Pathfinder adventure is designed for a group of four 1st-level characters, and takes place in the heartland of Varisia, a region featured in many beloved adventures including the Rise of the Runelords Anniversary Edition and Shattered Star Adventure Paths. In addition to the adventure, Murder's Mark also features a brand-new monster and a gazetteer of a Varisian carnival suitable for use with any fantasy roleplaying campaign.