In the second part of a crossover with CSI, we open with the team searching for Mac's girlfriend Christine and Shawn Boyd, both kidnapped by an Egyptian gang as collateral for the money owed to them by Shawn's brother. The team manages to arrest one of the members, Zane, and the kidnappers instruct Mac to meet them to exchange Zane for Christine. Detective D.B. Russell helps Mac distract the Federal Marshalls so he can present Zane to the kidnappers. Mac is able to turn the tables on the criminals and force them to bring him to Christine. After recovering Shawn's body from a warehouse, the CSI's note the symbol drawn in blood on his body and recognize it as the logo of a restaurant located directly across from a dry cleaners shop they questioned earlier to no avail. They determine that Christine drew the logo as a way to communicate her location and a background search reveals that the owner of the shop is Zane's sister, a key member of their crime family. She is arrested while Mac orchestrates Christine's rescue from the dry cleaners shop.