http://paizo.com/pfsacg
Play is organized into Seasons, throughout which the adventures and achievements of you and your fellow Pathfinders create an ongoing storyline. Each season consists of around 30 scenarios (short 90-minute sessions) set in a variety of exotic locations across Golarion. Scenario bundles will become available for purchase near the end of each month. The inaugural season, Season of the Shackles, is happening right now!
Season of the Shackles just finished and the copy should probably be updated.