In this case, Sascha Bergmann from LKA Graz and his colleague Anni Sulmtaler investigate the death of a young woman who is found by the novice Clemens at the foot of a staircase in the monastery library.

Georgy Hillmaier, single again, returns to Vienna after a long stay in Thailand. Completely penniless, without a job or place to stay, he ends up on the street until he learns that he has meanwhile become a father. In order to pay off the overdue alimony, Georgy has to get back into the call boy business in a brothel exclusively for women, run by his sister Gitti.

After a violent incident, Martha Müller is disillusioned with the teaching profession and decides that she does not want to get involved so much as a teacher. At her new school in Vienna, however, she is immediately confronted with a problem Ilayda. The 17-year-old Turkish student lives in Vienna with her very well integrated family. But she decided to wear a headscarf after her father's death. However, this distinguishes her more and more from her class.

SOKO Donau is an Austrian television series.