In an upscale high-rise in Chicago, a successful businesswoman is murdered as her boyfriend sleeps beside her; investigators point a finger at the boyfriend, but an exhaustive investigation uncovers the surprising architect of her murder.

A mother is shot to death while her young daughters lay asleep in the same room; baffled investigators wonder if an open door invited an intruder in, or if the killer is someone else she trusted who has been in the house all along.

A third grader wakes up to a nightmare, finding his mother stabbed nearly 40 times in her bed; the police suspect those closest to her as their investigation uncovers the shocking evil that crept inside her house that night.

A young teacher's assistant is raped and fatally shot in the middle of the night; her roommate, awakened by the noise, calls 911 and reports it as a suicide, beginning an intriguing mystery of motive, heartbreak and a tragic discovery.