Idea for opening sequence

My third idea would be a thriller opening sequence.

It would be a teenage girl who is getting ready in her bathroom and as she is washing her face, she  thinks she hears a noise but carries on getting ready, but then a slam of the door was heard. Quickly she washes her face and creeps out of her room to look over the banister onto the bottom floor of the house to which is a person dressed in all black walking around with a knife in his hand. 

She runs quietly back into her room grabs her phone and goes out of the front door to which he is there right in front of her, knife gripped tight and his eyes set on her. She screams 'dad' in hope he can help her, but she looks over to the open back door of the van to her dads head hanging out of it appearing unconcious.

The narrative would follow onto her being taken in the van not knowing where she is going or who this man is and trying to use her phone to get help but there is no service. She would eventually get taken to an empty room sat on a chair with multiple men and women dressed the same as the previous man who train her to become a murderer.