Chaab was an agent of the Zhentarim. He was send to Phlan to investigate the story of a black dragon that had had strange dealings with outsiders but had recently been killed by adventurers. Chaab however ended up being captured by the Foulwater goblin tribe who used the dragon's lair as a base. At last, he was rescued by adventurers hired to defeat the goblins and told them his story. Later Chaab was possibly involved in the case of thief at Mantor's Library, the Zhent's objective was acquire the subterranean complex in Dragonspire Mountains discovered by the adventurers for themself.