It's three o'clock of a bright autumn afternoon, and in grim contrast to the brisk air and brilliant sunshine outside, we look into the foreboding office of the astute and dreaded Mr Chameleon at police headquarters. Attracted by the beauty of the day, he steps to the window and gazes at the street below, when suddenly his door is flung open, and the commissioner of police hurriedly enters. Detective Arnold will be arriving to see Mr Chameleon soon, along with a dazed and hysterical girl who says she just saw a ghastly murder committed...