Catherine and Vartan stake out a drug ring in an upscale hotel while the rest of the team investigates a murder linked to "panty sniffing". Catherine and detective Vartan are thrown together in a hotel room for 24 hours while they monitor and stake out an ecstacy lab in the room next door. This brings them closer together, and Vartan admits to Catherine that he is not looking for something casual. In the mean time, Nick and Greg are on the strange case of a fetish that has become a big business -- panty sniffing. The murder of a hotel employee, who was also a lingerie model on the side, leads the team to her murderer - the hotel security guard, who was also her boyfriend.