A lone cat sitting outside Blair House in Washington, D.C., follows elderly sisters Charlotte and Ruth Dupree home, and then leads them on a merry chase that ends at a murder scene. The sisters "adopt" the cat as they try to "aid" authorities in solving the murder, but solving the mystery of the cat's origin and the name of his owner prove far more daunting than tracking down the killer for the sisters. How is the little feline connected to the vicious crime? And how did he come to be sitting on the front porch of Blair House--a noted Washington home where dignitaries and foreign leaders stay--seemingly waiting for the Dupree sisters to come by?