Timothy Stone, the F.B.I. agent who worked with the Bike Patrol on the bombing case in ""Lights Out"", returns to the Firehouse to get Cory and Chris' assistance in investigating a counterfeit ring operating in Santa Monica. Chris and Cory both find themselves attracted to Agent Stone, but when he and Cory begin a romance, Chris feels betrayed.

The counterfeiter, Lazlo Parkes-- who the Treasury Department has nicknamed ""Rumplestiltskin"" -- has been passing off fake $100 bills at Santa Monica hotspots with the help of a trio of women: Bree, Sheila and Lana. Lazlo is plotting to exchange one million in fake bills for a supply of heroin from drug lord Alejandro Cruz-- a drug deal that Palermo has ordered T.C. and Victor to investigate. Little does Lazlo expect that Bree is plotting with boyfriend Nicky Mink to kill Lazlo and take off with the money... until the other two women discover the plan.