It seems to be suicide - Catherine suffered from manic depression and there's even a note. but Detective John Cardinal thinks otherwise. Who better to konow his own wife's state to mind, after all? His friends and Aolleagues are less sure. Cardinal, consumed by grief and guilt, starts to dig. When strange notes appear, taunting him for his loss, his theory seems more credible. then the investigation turns dramatically. So shocking, it might never have been suspected. And John Cardinal must hunt a murderer who may be unstoppable...