Quien es realmente Mary Smith? Una alta ejecutiva de Hollywood es asesinada en el escenario de una pelicula. Pronto, lo que parece ser un crimen aislado se revela como un eslabon mas de una escalofriante cadena, Arnold Griner, redactor de los Angeles Times, comienza a recibir e-mails firmados por una tal Mary Smith en los que, en primera persona, se relata con morboso detalle cada uno de los asesinatos cometidos. El agente del FBI Alex Cross tendra que interrumpir sus vacaciones familiares para enfrentarse a este nuevo caso. / Who is really Mary Smith? A senior executive is murdered Hollywood scene in a movie. Soon, what appears to be an isolated crime is revealed as another link in a chilling chain, Arnold Grin, editor of the LA Times, he began to receive e-mails signed by one such Mary Smith in which, in first person, recounts with morbid detail each of the murders. The FBI agent Alex Cross will have to interrupt his family holiday to face this new case.