IMDB entry: here.
On the surface this seems to be a simplistic story about a man who stumbles on a drug trade gone wrong, picks up some money, and finds himself pursued by those who want it back at any cost. But there is a far more complex story going on hidden beneath the violence having to do with the thoughts and feelings of an old sherif who follows on behind trying to pick up the pieces.
The added complexity adds interest and makes this interesting than a typical action film. It keeps your interest during a lazy rainy afternoon and is worth the time.