It begins with a floater.

When Minneapolis homicide cops Rolseth and Magozzi are called to a derelict stretch of the Mississippi River, they see a bride, facedown, dead in the water. And when the Monkeewrench crew - computer geeks who made a fortune on games, now assisting the cops with special anticrime software - are invited by the FBI to investigate a series of murder videos posted to the Web, it's not long before the group discovers the frightening link between the unlucky bride and the latest, most horrific use of the Internet yet. Using their skills to scour the Net to prevent more killings, the team must race against the clock.before it's too late.