 A TLDR of Horde of the Dragon Queen, Episode 5, Construction Ahead. You've just made it north of Waterdeep, while following the Cult of the Dragon. The caravan that you took there stops at a supply depot to rest. This supply depot is known as the Carnath Roadhouse. After unloading, a misled cultist confronts you about murdering her friend. She threatens your life and vengeance of her ally, and begins to attack you. You beat her up and proceed to investigate the compound a little more closely. With the help of Jomna, you steal a key to the strong room from a half orc Sneaking into the strong room creates a treasure identified with a mark of the Cult of the Dragon. Hidden in the corner of the room is a secret passage which you learn is how they move their treasure out of the Carnath Roadhouse. Where do they take the loot? Only following the passage will uncover that mystery.