David Mamet's political thriller about the disappearance of the president's daughter is an unsatisfying slipknot of a film — it looks tight and elaborate, but give it a tug and it goes flat. Pretty, wholesome Laura Newton (Kristen Bell) has vanished mysteriously from her Harvard dorm room, leaving behind an urgent tangle of questions. Where was her Secret Service detail? Did the fight she had with her boyfriend over her new, spiky blonde hairdo escalate into violence? Is she having a secret rendezvous with the professor whose eye for pretty coeds is the talk of Harvard Yard? Or has Laura been kidnapped by enemies of the United States as part of some high-stakes polit...