Shadowrun: Mission: 04-05: On a SilverPlatter (PDF)
... ! Are you ready to serve up a side of revenge? SRM 04-05: On a SilverPlatter continues the latest series of Shadowrun Missions, building on the plotline that focuses on the ... conventions. This adventure also serves as a prequel to SRM 04-05: On a SilverPlatter.
That's right - buy On a SilverPlatter and get the original convention mission Copycat Killer for free!