Murder by the Lake (2014)

With three nations - Germany, Switzerland, and Austria - sharing its shores, Lake Constance has stories to tell, of hidden secrets under water and of gruesome murders only mentioned in a whisper. This is the workplace of German homicide inspector Micha Oberländer and his Austrian partner Hannah Zeiler. Contrary to Zeiler and her brilliant mind, Oberländer sees things pragmatically - the only way he can. But in the end, Micha and Hannah enjoy each other's company more than they would like to admit. And when the unthinkable happens, Micha's new Austrian partner Luisa Hoffmann proves enigmatic. Although she is highly disciplined, confident, and incorruptible, the mistakes of her past seem to catch up with her.