Under The Skin là một bộ phim khoa học viễn tưởng kinh dị được dựa trên tiểu thuyết của Michael Faber, kể về một người phụ nữ ngoài hành tinh đến những cao nguyên ở Scottland, dùng sắc đẹp, sự gợi cảm để bẫy những người đi nhờ xe và biến họ thành thức ăn cho những đội quân của cô ta.
An isolated house is too remote for a lone servant, who leaves a note, quietly exits the back door, and puts the key under the mat. Left alone in the house is a mother and her infant. A tramp has watched the servant leave and begins to skulk. When the lady of the house sees him outside as he discovers the key, she's terrified and desperately phones her husband, who's at work in town. He jumps into a car that's idling in front of his office and races toward home, the car's owner, and police, in hot pursuit.
Frank, a gay school teacher, has a very active sex life and an interest in making films. One evening, he meets Bernd and they become lovers. But while Bernd is attentive and caring, Frank gets bored and continues his polymorphously perverse ways.
Professor Clyde is on the lookout for a nightshirt bandit prowling the college campus.