I am asking for a moive that a girl is kidnapped from her job and the kidnapper takes her to a far place, next to a river that he killed a lot of women in it and all of them are in the bottom of that river. The girl finds a policemen who helps her and she falls in love with him and he does that too. The movie end when they think that they killed the bad guy but in reall they didn't and the guy is still alive.

Cabin by the Lake (http://en.wikipedia.org/wiki/Cabin_by_the_Lake)