The detectives only have three clues to work with including an unpublished manuscript, a missing computer file and a cat who knows the murderer. The clues point to three possible suspects who all live in the same building. Mallory starts baiting the killer with computer messages, but ends up becoming bait herself.
The detectives have just three leads to follow: an unpublished document, a missing computer file, and a cat familiar with the murderer. These hints suggest three possible suspects living in the same area. Mallory attempts to lure the criminal through computer communications but instead becomes a victim.