For Chicago cop Suze Figueroa, home is a sanctuary, a quiet refuge from the crime, corruption, and tragedy she encounters every day on the job. The truth is far more terrifying, for unknown to Suze, a stranger has moved into the house: an intruder who waits in the attic by day and prowls her home at night, spying on both the unsuspecting adults and the defenseless children. While Suze spends her workday tracking down an elusive serial killer, she has no idea that a much more personal threat lives under her own roof...