Peril at the Rock is a four-part Basic Fantasy RPG adventure module detailing a campaign played at a game convention. The first chapter focuses on a dungeon crawl within a strange tower built over a spatial rift unleashing Nazgorean monsters. Chapter two is a hex crawl across a wilderness map to locate a Hilltop Abbey possessing the magic needed to close the rift. Chapter three involves exploring the abbey, facing hivelings, and acquiring the miracle scroll. Finally, Chapter four returns the players to the tower for a final confrontation with the rift