In this science fiction thriller, child psychiatrist Catherine Deane (Golden Globe-nominee Jennifer Lopez ''Selena,'' ''Maid in Manhattan'') has developed a technique that allows her to travel through the minds of her patients. When Stargher (Emmy Award-nominee Vincent D'Onofrio TV's ''Law & Order: Criminal Intent,'' ''Full Metal Jacket''), a serial killer who methodically drowns his victims and performs bizarre rituals with their bodies, falls into a coma, FBI agent Peter Novak (Vince Vaughn ''Wedding Crashers,'' ''Dodgeball: A True Underdog Story'') asks Deane to enter the killers psyche in hopes of finding the location of a missing girl whom Stargher has kidnapped and, if she isn't found soon, will drown in her torture cell. However, once Deanne enters the bizarre world of Starghers mind, she finds getting out being a very difficult matter.