Teen nightmare follows viewers

For a teenage girl, it can seem as though everyone is a predator. Some are benign, like the boys leering through a fence at the beauty spending some late summer hours in her above-ground pool. Some are much more insidious. A lingering gaze without an invitation can be menacing. And actually letting someone in is, at best, a gamble - one that could turn out disastrously.

It certainly does in It Follows, a subversively unconventional horror film that plays with those ideas in one of the more brilliant and stylish genre send-ups of recent years.

Writer-director David Robert Mitchell wastes no time setting the mood with an invigorating prologue.