Allegra Maxwell is a 30-year old, single school teacher looking for love. Having chosen to use the Internet to meet the opposite sex, she encounters an articulate, prospective beau on the night the biggest blizzard in history is blanketing the Big Apple. Their pleasant conversation soon turns sinister when she discovers that "Charles" has been stalking her for weeks and claims he lives in her building. With threats of destroying her little by little are made, Allegra must stay one step ahead of the mind games. Turning to neighbors for help, tragic consequences ensue.
When her sanity is questioned, because the online evidence her stalker exists disappears, Allegra must prove he does exist and she isn't losing her mind. When a power outage thrusts her into darkness, will she be able to overcome the helplessness she feels? Placed in a situation that's spiraling totally out of her control, while trapped in her apartment building with no escape, will she survive until the authorities can reach her?