suspiria (1977)

Suzy Banyon an American student arrives at a German ballet school late one night and sees a woman run off through the woods. She finds out the next day that the woman was later murdered. After this shock Suzy tries to settle down and fit in, but is increasingly plagued by strange events and noises, and gets drawn deeper into finding out more about the woman who died.
As with many Argento films, this starts with someone seeing a seemingly inconsequential event and puzzling over a minor detail. This is Argento's crowning glory, the first of the Three Mother's Trilogy, involving a coven of witches that spans the globe. All the elements are here, the brightly coloured sets, camera trickery, intricate sound design, and convoluted plot. Every frame of this film is packed full of detail, as is the sound - a full on sensory assault. A fantastic film.