Ekki has inherited his aunt's house and field in a country village. Inspecting it, he and Wilsberg find it in a terrible state, plus the corpse of local farmer Hans Habicht, who pioneered a local bio energy plant, and was murdered. he boycotted and would would compete with village cop Heinrich Brandstetter"s son Oliver's regional employer's wind mill project. Ekki plans to donate his aunt's ruin to spinster neighbor Ulla Falkenberg, who nursed his aunt and has a crush I-on him since he spent the summer with her as a schoolboy. Next the aunt's autopsy shows she was poisoned.