Anna is a surgeon and, like her husband Gunnar, works at the hospital in a small town in the Mecklenburg Lake District. They have built a good life here with their son. Anna is torn out of her usual routine when a child suddenly suffers an allergic shock after a routine operation, which was triggered by an antibiotic that Anna had not been given. A medical mystery for Anna until she finds out that the clinic has a massive hygiene problem. The more unpleasant truths Anna uncovers, the more hostile she becomes. Anna is faced with decisions of conscience that could bring down everything she has built up so far.