Developing the Narrative

We started originally by having the protagonist beginning in her bedroom  se walks down the street on her phone. The boyfriend finds her with a dead body and backs away. We end with her the next day as she's received a text saying how could you. 

The next Idea was that we had her meeting up with her boyfriend the boyfriend screams and runs away and again she receives a tex

t.

The last idea involved her metting up he has set a camp up for her they approach, he turns around but she chases him she wakes up in a coffin. 
We decided to have her meeting him in the forrest because she can't face other people but needs to tell her boyfriend. She rings him wondering where he is. Their is a stalker following her she screams. The boyfriend runs for her. By this time is a lot of narrative enigma as to the identity of the villain. We realise she is a murder because she is stood next to a dead body then we realise she's a vampire.  She wakes up from a dream but then she realises she is in a coffin and that it turns out to be true.