Bittersüsses oder SauresLena is 15 years old, and lives alone with her mother in a small apartment. She does not know her father. But when her mother suddenly dies, Lena has to move in with him and his new family, in a big villa on the lake.One day, Lena hears her mother's voice. But she is dead, she thinks. Or is she? The voice reappears. It is definitely her mother. The voice is loud and clear:"Lena, you know that I really, really love you. I didn't tell you how sick I was... I didn't want you to worry..."