This is a very insightful film about impetuousness, sex, and the unique ability that sex has to cause people to mistake it for love, a phenomenon especially prevalent among the young.
The film centers on a slightly-naifish Texas waitress who hooks up with a cynical but lovable Danish tourist. They satisfy the powerful sexual energy between them over a few days, and then a plot twist turns the girl's world upside down. As a result, the waitress makes a series of improbable and extremely irresponsible decisions that lead her on a journey to Denmark. As often happens, the bad decision making just keeps compounding and, by the end, the entire affair turns into a monumental train wreck.
When I say "improbable" I include a few plot twists that are not really plausible in terms of the time line. But no matter. The characters are likable and the story compelling, so maybe viewers will not notice until they think about the movie afterwords.
The movie works because the waitress is transformed by the experience and finally becomes able to sort out the differences between passionate sexual attraction and real love, which can only be conferred through a lasting relationship.
In the last minute of the movie, the waitress makes her first good, responsible decision in the entire film, and that makes the journey worth the investment.