Christian Petzold, director of such German neonoirs as Yella (2007) and Jerichow (2008), delivers the first installment of the Dreileben Trilogy, three movies by different directors that function as discrete narratives but are linked by the peripheral movements of a serial killer. In this one, a young male nurse (Jacob Matschenz) pursues a heavy-breathing romance with a comely hotel maid (Luna Zimic Mijovic) after furtively watching her fellate a biker at a midnight lakeside party. There isn’t much more to the plot than that, but Petzold—whose Jerichow managed to approximate the primal lust of The Postman Always Rings Twice—proves that the urgent physical needs of attractive young people generate their own kind of narrative momentum. In German with subtitles.