E12/Somehow the Questionable Choices succeed in taking the girl to the Harpers in Skullport. Once there, the heroes learn many secrets from the faction’s leader. Later the party head deeper into Undermountain, taking a raft down the river.
E7/Our heroes sneak into the Cassalanter compound and decide to burn it to the ground! However, they are confronted by a number of devils in the courtyard and have to fight their way out. Later they are given a new quest and enter the immense Undermountain.
E6/Having found the treasure trove, the party seek to free Waterdeep from the grip of evil nobles. They start by facing off against more devils and several cultists.
When they return to their neighborhood, the heroes find a secret entrance and head into the sewers. They are searching for a way into the Cassalanters. After learning the evil nobles plan a mass murder, the party wants to prevent it.
E5/Searching in the City of the Dead, the party finds clues that lead to an ancient windmill. After defeating some devils, they learn that several magical items are going to be needed to open the hidden vault. Later the heroes discover an entrance to the legendary vault.
E4/Our heroes continue to search for the magical stone in Waterdeep. They find some evidence that a construct is involved in the mystery and begin to search for it.
Later the heroes visit a noble compound looking for clues and are quickly surrounded. Harmonica panics and attacks the nobles and the party ends up being taken prisoner.