Butterfly Effection

I watched this movie by accident.I have heard of good comments before.Once I watched,I could not stop.
It was a suspect movie,a little bit scary actually,with blood sights and killing spots.It tells us a man who has the ability to jump to the past and change it.He inherits this from his dead father.When the situation is bad,he tries to jump back by staring at an old photo,and he tries his best to fix everything in the past to make things better.But he is always in trouble.Eventually,he dies for his girlfriend,because she misunderstand his behaviour,that he sacrifices his life to save her.In fact,he really want everyone,except himself,to live better.
Then,police noticed a series killer who abuse young girls cruelly until they die miserably.A detective,who also has the ability to jump,tried to figure out the case with his sister's help,but he fails every time since once a girl is saved,another die.Everyone begins to suspect him,until it turns out that his sister commited the crime.She regard these girls as threats to her,since his brother,the detective will love them.Sounds weird,isn't it?Sister loves her brother in this abnormal way!
The movie wants us to know that people who base their interest on other people's pain will be punished eventually,so we must be kind to people,don't be selfish.It's worth seeing,I recommand you all to watch it.