From the introduction:
Olkana, a kindly, young brass dragon, has lived for several decades in Dragonmaw Cave to the north of town. Though no one has seen any sign of her in months, the elders suspected she was hibernating or nesting a clutch of eggs. Recently, some claimed to see at least one hatchling dragon awkwardly flying across the sky at night. This doesn't seem like kindly Olkana's newborn, though. Livestock and pets have been stolen, travelers have gone missing, homes and shrines have been desecrated, and even some wells have gone foul. Unsure of what to do, you've traveled three days to Dragonmaw Cave to see if the elusive Olkana can help.