How does this sound ???

A 16 año old girl gets invited to a party where one of her friends are murdered .a masked killer starts revealing secrets about the survivors and he starts killing them off one por one until the main character who I've named Scarlett is left but she survives and finds out the killer is someone she forgot about but Scarlett would bully the killer all the time as children and now they wanted revenge. Before the killer can kill Scarlett the police find them and shoots the killer down and then I will just end it around there.
What did Scarlett look like in your mind when tu read this and what would the killer look like. What should the título be