Zhentarim?
Raener Neverember
They were jumped because they were interested in dad's artifact (stone of Golorr - to find gold)
Xanathar Guild?
They took Floon thinking he was Raener & attacked Zhentarim
Raener suggests speaking to Mirt/Vajira Archmage (Black Staff)
Mirt master of harpers masion (Dock Ward)