An author, preparing a book about a well-publicized murder case in a small California city, is killed when his yacht blows up. The author's publisher hires Mannix to find the book's last chapter, which is said to solve the murder case. Mannix encounters a hostile police chief who wants to chase him off and an oil-company executive wanting to buy him off. Mannix refuses the bribe and endures a beating by the corrupt police chief but remains committed to finding the missing chapter.
Did You Know?
When Chief Ford (Clifton James) comes to Mannix' motel room, Mannix receives a telephone call. After he hangs up, Mannix scribbles something on a notepad with what is clearly a pencil (and which makes a "scratching" sound as he writes). When Mannix leaves the room, Chief Ford picks up the note to read it, but the note, which is shown in a close-up, is written in ballpoint ink. See more