From the PDF:
An Unofficial RAVENLOFT® Adventure for 4-6 characters of level 6-8
This adventure is set in the Zherisia cluster and details the fourteenth murder spree of the infamous killer, Bloody Jack. It is occurs thirteen years after the Ravenloft adventure Hour of the Knife. Although it is intended as a sequel to that module, Shadow of the Knife is usable by both those who have played Hour of the Knife and those new to the murky city of Paridon.
While both the PCs and the Paridoners have more information than they did last time, they discover new threats to deal with: the marikith of Timor, whose monstrous Hive Queen covets the Fang of the Nosferatu, and the new Bloody Jack, a golem made by Emil Bollenbach from the flesh of doppelgangers. The
adventure is also intended to contain a few scenes reminiscent of Hour of the Knife, but given a few new twists.