I spy...murder...

When Andie, Julie and Raven heard music coming from an empty house and peeked through a window, they never could have predicted what they saw: a man and woman engaged in a dark and ritualistic sex act.

Stunned, and then curious, they girls return to the house again and again - and each time, what they see is more shocking. Eventually, fearing for the life of the woman, they contact the police. But too late-the woman has already been found dead.

Years later the girls return to their hometown, but they are not alone. Someone is stalking them, someone who knows what they saw...and plans to make sure they never repeat it.