Klute

A Pennsylvania chemical company executive, Tom Gruneman, disappears. The police find an obscene letter in Gruneman's office addressed to a New York City prostitute named Bree Daniels, who had received several such letters. After six months of fruitless police work, Peter Cable, a fellow executive at Gruneman's company, hires family friend and detective John Klute to investigate Gruneman's disappearance.