As early spring comes to Moose County, Jim Qwilleran is looking forward to the peaceful beauty of nature's rebirth. What he gets instead is a chorus of noisy birds that constantly wakes him from a sound sleep--especially when Koko insists on joining in with his own feline version of birdcalling. But soon Qwill is wondering whether Koko is trying to say more than just "tweet tweet," because a series of strange events--starting with an act of vandalism and culminating in a mysterious chain of death and disappearance--has Pickax in a similar uproar. It seems that this spring, a cat's fancy may turn to crime solving...