His head was bashed in, the body left to lie in the rear of the hole-in-the-wall restaurant he ran on Fountain Avenue. A copy of the county directory neatly tied with green ribbon lay on the body, and tucked into the ribbon there was a note: THIS IS NUMBER ONE! GREENMASK. Number two was a woman. complete with county directory and neat green ribbon. Then there was number three, and suddenly number tour, slumped in a movie house on Sunset Boulevard, county directory, green ribbon. and the note on his lap. It looked like a series of psycho murders, but Sergeant Ivor Maddox of the Los Angeles Police Department had feeling he'd heard it all before, and then he had a hunch.