A Living Forgotten Realms module, publically released by WoTc.
From the Title Page:
A killer stalks the night in the port city of Marsember, hunting down those with ties to the Haldoneir family, while the Agony drug continues to be a blight on Cormyrian society. Can the PCs figure out the killer’s motive and stop them before the situation worsens? A Living Forgotten Realms adventure set in Cormyr for characters levels 11-14. Part of the Pain and Suffering major quest, which starts/continues in DRAG2-1 Discomfort (level 11-14) and concludes in DALE2-2 Agony (level 14-17).