Practical semester at the Halle/Saale Police College: Finally out of the seminar rooms and into real life - which for the students means: real murder cases. With the support of their trainers in the homicide squad, they will have to solve this. The beginners sometimes overshoot the mark, make mistakes and have to learn new things on their way to becoming fully qualified detectives. In each episode, a case between the university and real life is dissected, discussed and solved, while the private complications of the students, lecturers and trainers are not neglected.

13-year-old Jonja goes on vacation with the wealthy family of her best friend Paul. None of this would be a problem if the girl had told her mother about it - but she hasn't. Meanwhile, the days at the lake turn out to be extremely idyllic: Jonja falls in love with a girl and her friendship with Paul is strengthened even further. When it becomes clear that Jonja has lied, emotions run high...