Finding Nicole

Natalie has a hard time dealing with her parents after losing her sister to a kidnapper when they were only 5 years old. Her mom becomes depressed and her father is trying to get a hold of himself and the house. 11 years later Natalie stumbles arcoss a picture with a face that very much resembles her lost twin.
What will happen?
Is the girl in the picture who Natalie think it is?
How will her family handle this situation?
What happens if it really is her twin?