The settings are a small town in southern Germany and a guesthouse by a quiet lake in the mountains. A man and a woman are observing a young woman, Evi. The two observers do not know each other and have completely different goals. Melisande is thirty-nine and has only one purpose in life: she wants to kill Evi because she blames her for the death of her husband Achim and her son Malte. Her appearance, which she perceives as unremarkable, serves as the best disguise. For three years, she has carried a knife in her anorak pocket, and for three years, she has moved every time the restless Evi moves. She is always near Evi, following her on the bus, no matter where the journey leads. And now she lives directly across from her. With a suitcase full of photos and documents from her life, including a sealed letter. That's all she has kept. Melisande's place is the window. Just.