The Daughter(2012)

Original title: Дочь

Inna lives with her dad and little brother in a small town. Her life changes when a new girl, Masha, comes to her school. They become friends. But Masha is murdered by a maniac serial killer, who kills teenage girls in the town. Inna goes to church for the funeral service. There she meets the priest's son Ilya, whose sister was also murdered.