The PCs are sent to a remote fishing village on the southern shore of the Lake of Mists and Veils to investigate a hidden vault supposedly belonging to House Rogavaria, the former ruling house of Brevoy that went missing more than twenty years ago. The former Head Librarian of Restov’s largest library, Nephaira Savakress, spent years searching for the truth behind the myths and legends of Choral Rogavaria also known as Choral the Conquerer. She found the location of the vault and of the history of Choral, but her source mysteriously disappeared. She has chosen to place her trust in the Pathfinder Society to retrieve this information. But there are forces in play that want the information to remain hidden, and they'll kill to do so.