The Extinction Curse Adventure Path begins! The Circus of Wayward Wonders has just arrived in the remote town of Abberton, and the player characters are the stars of the show! When the ringmaster turns up dead, the fate of the traveling circus and its entertainers hangs in the balance, and the heroes must scramble to put on a successful show and find the killer—all at the same time! Investigations only lead to more questions, and the heroes find themselves centre stage in a dangerous, prehistoric plot that threatens not just Abberton, but every inhabitant of the Starstone Isles!

"The Show Must Go On" is a Pathfinder Second Edition adventure for four 1st-level characters. This adventure begins the Extinction Curse Adventure Path, a six-part, monthly campaign in which the heroes lead a traveling circus as they unravel a plot to eradicate all life from the Starstone Isles at the heart of the Inner Sea. The adventure also includes advice on how to run a traveling circus, new circus-themed rules, and a menagerie of monsters both wondrous and wicked.

Each monthly full-color softcover Pathfinder Adventure Path volume contains an in-depth adventure scenario, stats for several new monsters, and support articles meant to give Game Masters additional material to expand their campaign. Pathfinder Adventure Path volumes use the Open Game License and work with both the Pathfinder RPG and the world's oldest fantasy RPG.