The Big Sleep

Los Angeles private detective Philip Marlowe is summoned to the mansion of General Sternwood, who wants to resolve "gambling debts" that his daughter Carmen owes to bookseller Arthur Geiger. As Marlowe is leaving, Sternwood's older daughter Vivian stops him. She suspects her father's true motive for hiring a detective is to find his protégé Sean Regan who had disappeared a month earlier.