Earl Brooks (KEVIN COSTNER) is the Portland businessman and philanthropist of the year, an award he shares with his wife Emma (MARG HELGENBERGER), while wishing their college freshman daughter Jane (DANIELLE PANABAKER) could have been there to share in the joyous moment.
Yet, Earl has a secret. A self-proclaimed addict, he isn't hooked on booze or drugs, but rather killing. Known in professional circles only as "the fingerprint killer," he's kept his double-life secret thanks to meticulous planning of his homicides, as well as the help of Marshall (WILLIAM HURT), a personification of his own id that only he can speak to or see.
Hoping to catch him are detectives Tracy Atwood (DEMI MOORE) and Hawkins (RUBEN SANTIAGO-HUDSON), but she's constantly distracted by her soon-to-be ex-husband constantly raising his divorce demands. Unlike them, a man who identifies himself only as Mr. Smith (DANE COOK) has accidentally photographed Mr. Brooks in the act. His intent is to blackmail the businessman, but not for money. Instead, he wants to go along for the voyeuristic thrill of witnessing the next kill.
Concerned that Jane might be a chip off the block when she unexpectedly drops out of school, and egged on by Marshall to continue his killing spree, Mr. Brooks finds himself torn about what to do, all as Det. Atwood closes in on her man.