Someone is stalking prize-winning purebreds at the annual Las Vegas Cat Show, and Midnight Louie is off on the prowl again. As Louie, aided by a telepathic Birman cat named Karma, follows the scent of the killer, Temple is delving into the past of Matt Devine, the handsome young hotline counselor who's captured her heart. Soon Louie and Temple find themselves up to their tails in blackmail, extortion, and cold-blooded murder. Fans of foul play, feisty female detectives, and feline forensics are sure to find Cat on a Blue Monday just their saucer of milk.