Country pharmacist Dr. Victor Bucerius is horrified to discover that the dead woman in his garden is his own sister Julia. Who could have had a motive to murder her? While he would have loved to learn his sister's secret recipes, as she was a renowned herbal expert, he would never kill her for that! Or would he? The unconventional amateur chemist quickly finds himself under suspicion of murder by Commissioner Stine Jessen. But why does Victor start investigating the case on his own if he is indeed the murderer? Or is he simply trying to lead her down the wrong path?.