The player characters are hired by a coven of vampires to track down a psychotic street mage who is killing them off, one at a time.
This adventures was first published for SR 1st edition in Adventures Unlimited
Later it was published for free on RPGarchive.
It was also used as part of the RPGA Virtual Seattle campaign, for SR 2nd edition.
A separate, non-RPGA Virtual Seattle, version for SR 2nd edition is also available.