Fremrock was one of the investigators hired on to investigate the Harmony Opera House. Fremrock didn't really care much for the talking, but immediately became more involved at the realization that fellow goblins were at risk. When he learned that goblins were working on the site alongside hob golbins and orcs, things took a more serious turn for him.
He joined in the search through the opera house and investigated one of the dressing rooms while the others were talking to the workers and Valora. After taking off one of the heads of the mannequins, Fremrock and Gazlit decided to take to the roof and wait until night fall. Here is where they observed the normal duties of the workers within the opera house.
When night fell and the others returned with their mexican food, they initiated the investigation. Several haunts came through leaving Fremrock mostly in tact. They eventually came face to face with the source of the haunts and found themselves in a battle against them. After a frightful banishment, they all got ready to face the return of the entity. Here is where they came face to face with a new individual carrying the severed head of Valora. They thanked them for their services in realizing the lack of potential the underling had. Thus another mystery was solved.