A Pathfinder Society Scenario designed for levels 3-7. Alarm bells blare throughout the Pathfinder Society's Grand Lodge as chaos reigns in one of the vaults below. The PCs must venture into the vaults to put a stop to the mysterious incident. They quickly learn, however, that what has happened in the Grand Lodge is almost certainly not an isolated event. It falls to the PCs to follow this disruption's trail, a mission that puts them on a collision course with mysterious forces that wish to unleash horrors from beyond reality upon Golarion. Contents in Call of the Copper Gate also contribute directly to the ongoing storyline of the Dark Archive faction.