一個炎熱的夏天，一間鄉郊的大宅，一對10歲的孖仔，等待著手術後歸來的媽媽。但等到的，是一個繃帶纏著滿臉的媽媽，她行為怪異、神情古怪。孖仔開始懷疑繃帶背後，藏著的不是媽媽，而是另一個人。大細孖決定採取非常手段，揭開步步驚心的真相之謎。奧地利性格導演《天堂三部曲》尤里塞德監製，由他的太太與姪兒執導，以菲林拍攝，把母子間潛藏的恐懼與角力在劇情及視覺中呈現，驚人結局嚇盡全球觀眾，橫掃全球12個電影大獎，好評如潮，再創驚慄經典。

One of the creepiest films of the year, a must-see for horror film enthusiasts. Goodnight Mommy revolves around a mother and her ten-year old twins. Or is she really their mother? In a hot summer day, two ten-year old twins are waiting for their mother to return from her plastic surgery. When she returns, her face is wrapped with bandages; even her personality has taken quite a shocking change. Distant, cold and at times mean, the two boys start to wonder whether this is really their mother, and they are planning to take extreme measures in order to find out the shocking truth.