Coincidence, contrivance, and cliche mar this German thriller about a love triangle that’s been festering for decades, but if you’re OK with that, you may find it enjoyably malevolent. In high school, princely young Georg hands over his blond girlfriend, Anna, to his buddy Paul, exacting a promise that one day Paul will return her. Fast forward to their middle age, when Paul (Mark Waschke) and Anna (Marie Bäumer) are married with children and Georg (dead-eyed Sylvester Grosch, who played Goebbels in Inglourious Basterds) reappears as Paul’s new boss at a big investment house. French writer-director Denis Dercourt (The Page Turner) can’t bear to leave it at that, so Georg eventually becomes a Faustian figure, in keeping with the wall-to-wall score of somber string music. With Sophie Rois (Tom Tykwer’s Three) and Saskia Rosendahl (Lore). In German with subtitles.