This legacy is a heavy burden: East Frisia's most famous inspector Ann Kathrin Klaasen is facing the biggest challenge of her career. One of the most successful German crime series is celebrating its anniversary: "East Frisian Heritage" is the 20th case for Ann Kathrin Klaasen. An entire city panics when Radio Nordseewelle reports the discovery of two bodies early in the morning. One was placed in front of the famous tea museum in the city center of Nord, the other in the newly opened crime museum. The first people are already talking about the "museum murderer" and wondering where and when he will strike again. But when Ann Kathrin Klaasen sees the body of Helga Bornemann, she knows that something much bigger is at stake here and that this case will become a turning point in her life and professional career.