Two feet in house slippers, fried potatoes, and a lot of blood - the old Gertrud Bense lies murdered in the kitchen of her Frisian house on Föhr. And for her son Hardy, it’s already clear who the murderer is: Gabi Tammen. The single mother had been in constant conflict with her neighbor, who was also her landlord. However, Commissioner John Benthien and his team are not entirely convinced of Gabi Tammen's guilt. There are other suspects who had motives to kill the domineering woman. When Benthien then stumbles upon a very special American website, the case suddenly takes a completely new turn...