It was an adventure written by Chris Perkins. Here is an excerpt from an interview with him, in which the adventure is mentioned:
"Encouraged by my earlier work, the RPGA® Network asked me to design a three-round AD&D Open tournament based on the PLANESCAPE® Campaign Setting. The result was a titanic trilogy of adventures collectively titled "Cutters." At close to 75,000 words, it's the longest thing I've ever written, and probably the best thing I've written as a freelancer. TSR was in financial turmoil at the time, so I wrote the adventure for free. The "Cutters" trilogy is mostly set in Sigil and takes place prior to the events chronicled in Faction War. The plot involves heroes from various factions working together to achieve a common goal-preventing the return of a not-quite-dead faction called the Incanterium. It's a matter of personal pride that I was able to incorporate over one-third of the NPCs from the Uncaged: Faces of Sigil accessory into the "Cutters" trilogy. I also found room to include the Lady of Pain in one climactic scene."