A man follows a trail of strange objects in some lockers to a shocking discovery; a medical student suspects someone is breaking into her place.

A young cop questions a beautiful woman about a murder in her building; in a hotel room, a stressed businesswoman puts on a show for a peeping tom.

A laundromat worker witnesses a murder and tries not to be the next victim, two teens' escalating cyber pranks on each other backfire badly.

A phone installer shows up at an apartment, setting off a shocking chain of advents; a salesman hires an escort and gets more than he bargained for.

An office worker discovers an enigmatic postcard; a woman is emailed a series of videos showing people being murdered.

A hospitalised woman, unable to move or speak, knows her attacker is back; a suicide hot line operator pleads with a caller to save his own life.