Jonathan Glazer’s Under the Skin is a film with the courage of its silences and ellipses. Most easily categorized as a species of science fiction, it deftly evades verbal explanation and explicit continuity. It is in fact based on a well-received science fiction novel by Michel Faber, concerning an alien being who has been sent to northern Scotland in the guise of a woman to pick up and trap men for consumption by other aliens. But Glazer seems to have ended by omitting most of the narrative content of his source, taking away backstory and motivation bit by bit until what is left is deliberately fragmentary and open-ended.
Another good review of Under the Skin, this by Geoffrey O'Brien in The New York Review of Books.