The cops won't help Jill as she hasn't been 'formally' threatened yet, but promise they'll monitor all calls to the home, and can track the caller's location if she keeps him on the line for over a minute.
She finally decides to check on the kids, but they're both sound asleep. No word from Rosa though, even though she keeps calling her name.
Jill can see a shadow moving behind the curtains of the Guest House - she calls the number, but the Mandrakis's son doesn't answer. Suddenly feeling brave, she picks up a flashlight, locks the kids in the house, and sprints on over in the darkness. She makes it inside - but soon finds that it's empty.
She receives another call - and manages to keep the stalker on the line for over a minute - but he called the Guest House and not the main line. She panics and races back over to the house.
About this time she gets a call from the stalker again and keeps him on the line. Feeling brave, she makes her way up to the top floor and Rosa's room - and, creepily, into the bathroom where the shower is on, and takes a peek behind the curtain ... and no one is there. A phone rings in the room - where she turns around and finds the dead body of her best friend. the police phone her back - and tell her to get out - the call came from inside the house!
She races out to the ground floor and is tempted to leave - but instead decides to collect the kids. They're both hiding in the toy chest ... but looking up she sees the stranger for the first time, who has been hiding in the rafters. The lock the door, and get out through a window into the atrium.
She hides in the water - and finds Rosa's dead body. The stranger soon finds her and they struggle. She manages to lock him inside, but it doesn't last long. The kids escape out the front door, but the stranger drags Jill back inside the house and they fight again. She stabs him with a metal poker from the fireplace and runs outside - into the arms of Officer Burroughs.
A full squad have finally shown up, and they capture the man (the dude with the scar from Gladiator). As he is taken away, Jill gets a good look at him.
Her nightmare doesn't end with that night though ... and she is tormented by her encounter with The Stranger in her dreams.