A female corpse was found in a Alpine lake. Inspector Lisa Kuen cancels her vacation, and takes over the case, because she grew up in the next village and is familiar with the area and the people. To the displease of her college Alex.
Through previously undiscovered private letters, photos and diaries that were found in the Himmler family house in 1945, the "The Decent One" exposes a unique and at times uncomfortable access to the life and mind of the merciless "Architect of the Final Solution" Heinrich Himmler.