Deyanira Mirukova comes to the champions of Korvosa in search of help to find her missing brother, Ruan Mirukova. He went missing a few days ago when he was invited to play at a party in South Shore and he never came back. And when she went to Carowyn manor to investigate, all the curtains were drawn, and a strange smell was emanating from the front door. No one answered her hails, and she was just on her way to the Citadel to ask for help.
The PCs enter the house and find a massacre has taken place. All the partygoers are dead and were then reanimated and posed to continue partying as undead. A Harlequin was the one behind the massacre and Ruan can not be found in the house. After much time passes because they were playing a game of cat and mouse the party slays her in a quick fashion.
But they did find a man called Ausio Carowyn and he was able to tell the party all that he saw. Which entailed Jolistina killing everyone with blood veil arrows and turned them into zombies instantly. But last he saw of Ruan he was in the gallery when she attacked.