Seven, eight ... Gonna stay up late (Rebekka Franck, Book 4)

Just fourteen years old, Amalie thought she could take off and go to the festival with her best friend without anyone knowing it - without her parents finding out. She thought she was safe when she met a man offering her drugs, she thought she was safe when she went alone to her tent to take the pills. But when she opened her eyes and found herself in the man's basement, she knew she wasn't safe anymore.

She was trapped.