After her mother is murdered by her stepfather, gifted 15 year old student Pearl goes to live with an ex-lover of her mother, a grumpy unemployed film director who, pending the results of a paternity test, may be her biological father.

Jerry and Rachel are two strangers thrown together by a mysterious phone call from a woman they have never met. Threatening their lives and family, she pushes Jerry and Rachel into a series of increasingly dangerous situations, using the technology of everyday life to track and control their every move.