Delphinsommer (2004)

Teenage Nathalie (Anna Maria Muhe) moves to Berlin with her parents and baby sister. She starts at a new school and finds fitting in difficult because her parents have raised her to adhere to a strict Christian belief system. Her new friend Sibille commits suicide because she can't escape from the violence and oppression of her family life and their religious sect. Through her new life in Berlin, Nathalie discovers how wrong her church is and is eventually set free by her own mother into the hands of her birth father and her caring boyfriend.