The premise of this movie was decent enough, but with sub par acting, it was just bland and dull.
SPOILERS The film does not work because of the nature of the death, it was accidental, so although it was a murder it wasn't like the guy set out to do it. Also through some flashbacks there is a secret that is revealed that sort of makes the events like justice to a degree. There is no emotion in this film. The first 20 minutes or so is just this woman calling her sister, and hearing her message. It was dull and boring.
With some polishing, and better acting it could have been pretty good.