Meeting Stranger

Sara came into a new city and she went to an amusement park. In that place she met some stranger and that person looks like Sara. That person was Nora and both of them talking suddenly one person entered shot both of them. Sara lost her memory and Imposing as Nora thought to find out who was trying to kill her??.. Did Sara regain her memory?? ... What happened to Nora???..... Was Sara going to stay as Nora??... Who is that killer??...