Planning: Initial idea

After gathering up different ideas which could possibly be within my film opening, I decided on what it will be about. The protagonist will be a female who goes to a party with her friends and then gets a message from her boyfriend to meet her in the woods. As she is wondering within the woods I will have the antagonist (who is the killer in the film) to sneak up on her and she will end up looking as if she had died at the end.