Droop's Dilemma

Introduction: Droop has been living the dream by goblin standards ever since he came to live in the rebuilt Cragmaw Castle. That is until recently. Lately Droop has been plagued by attempted break-ins and is beginning to think that he should just move away. He is unsure of what the villains are after, but has gathered a few clues and is desperately searching for a group of brave adventurers to help him solve this mystery. Why are they attacking his home? What do they want? And more importantly, how can they be stopped.