Beckett and Castle team up with experienced FBI Special Agent Jordan Shaw (Dana Delany) in the hunt for a serial killer with an apparent obsession for 'Nikki Heat', the character Castle based on Beckett in his best-seller Heat Wave. It soon becomes apparent that not only is Beckett jealous of Castle's admiration for Shaw and the FBI's hi-tech gadgets, but that Beckett herself could be the killer's ultimate intended victim. Castle also strikes a deal to make Heat Wave into a movie.

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