When John Cardinal's wife plummets to her death after losing her battle with depression, everyone is sure it is a tragic suicide - there's even a note. Everyone, that is, except Detective John Cardinal. Stricken with grief and guilt, Cardinal launches his own investigation, helped by his reluctant colleagues. When mysterious notes appear, taunting him for his loss, his theory suddenly seems to be credible. Cardinal revisits his past, searching for a possible suspect among his previous arrests. Someone with a grudge, a person twisted enough to target his innocent wife in revenge. But when more mysterious suicides are discovered, the investigation takes a very different turn, leading to a startling new possibility. One so shocking, it has never been suspected.