GOODNIGHT MOMMY: Watch The International Trailer For The Arty Shocker

A huge favorite on the festival circuit, Veronika Franz and Severin Fiala's arty shocker Goodnight Mommy (Ich Seh Ich Seh) - the story of two young boys increasingly convinced that the woman who returns home from hospital is not actually their mother - is now gearing up for release in its native Austria, which means the first full trailer is now upon us.

In the heat of summer. An isolated house in the countryside between woods and corn fields. Ten-year-old twins wait for their mother. When she comes back, her head wrapped in bandages after plastic surgery, nothing is as it was before. Stern and distant now, she shuts the family off from the outside world. Starting to doubt that this woman is actually their mother, the boys are determined to find the truth by any means.