They found a glass eye, clutched in the dead man's hand - staring at them, unwinking, and evil. Had it belonged to the mysterious intruder who had attacked the young woman on the couch? But the only person who could help Parry Mason clear his clients had promptly disappeared. There were more complications to come for Mason. At one point, the brilliant lawyer-detective looked like he would soon land in jail himself after he used one eye too many in this baffling case.