Somebody is intent on murdering Hollywood's A-list.

A well-known actress has been shot outside her Beverly Hills home.

Shortly afterwards, the Los Angeles Times receives an email describing the murder in vivid detail.

It is signed Mary Smith. More killings and emails follow - the victims are all major Hollywood players.

Is it the work of an obsessed fan or a spurned actor, or is it part of something far more terrifying?

As the case grows to blockbuster proportions, Washington, DC, FBI agent Alex Cross and the LAPD scramble to find a pattern before Mary can send another chilling update.