Ina, a geologist, returns to her hometown of Neukirch to transfer her share of the inheritance of the family hotel to her niece. This eastern German village, which once thrived on coal mining, was turned into a lakeside resort after the fall of the Berlin Wall. It was the life’s work of Ina’s father, Walter, as mayor to spearhead the flooding of the open-pit mine which created the artificial lake. However, a dark family secret lurks deep underwater.

The senior investment banker Jochen Walther is at the peak of his career at the Deutche Bank. He just finished the deal of his life along with his personal assistant Tom Slezak, when during the celebrations he suddendly jumps from the roof of the bank's headquarters in Frankfurt. Was it suicide or even a murder?