But the twists, turns and “who’s-the-traitor?” angle will keep you glued, and who the heroes are exactly is never really clear until the end. But the story's many twists, turns and double-crosses are so carefully plotted and clearly told that Black Book is never confusing - or boring. Don't be put off by the movie's length of 145 minutes - the time flies by, bookended by two sections set in Israel in 1956 that add considerable emotional resonance, offering both a happy and an immensely sad ending for those paying careful attention.