Generate a question about the following movie plot: A British ghostwriter (Ewan McGregor) is hired to complete the autobiography of former Prime Minister Adam Lang (Pierce Brosnan). His predecessor and Lang's aide, Mike McAra, has recently died in an apparent drowning accident. The writer travels to Old Haven on Martha's Vineyard, Massachusetts, where Lang and his wife Ruth (Olivia Williams) are staying, along with Lang's personal assistant (and implied mistress), Amelia Bly (Kim Cattrall). Amelia forbids the writer to take McAra's manuscript outside, emphasizing that it is a security risk. Shortly after the writer's arrival, former Foreign Secretary Richard Rycart (Robert Pugh) accuses Lang of authorizing the illegal seizure of suspected terrorists and handing them over for torture by the CIA, a possible war crime. Lang faces prosecution by the International Criminal Court unless he stays in the U.S. (or one of the few other countries that does not recognise the court's jurisdiction). While Lang is in Washington, the writer finds items in McAra's room suggesting he might have stumbled across a dark secret. Among them is an envelope containing photographs and a phone number the writer discovers is Rycart's. During a bike ride, the writer encounters an old man (Eli Wallach) who tells him the current couldn't have taken McAra's body from the ferry where he disappeared to the beach where it was discovered. He also reveals a neighbour saw flashlights on the beach the night McAra died, but later fell down the stairs and went into a coma. Later, Ruth admits to the writer Lang had never been very political, and until recently always took her advice. When he tells her the old man's story, she suddenly rushes out into the rainy night to "clear her head." Upon returning, she reveals Lang and McAra had argued the night before his death. The next morning, the writer takes the BMW X5[5] McAra used on his last journey. Unable to cancel the pre-programmed directions on the car's sat-nav, he decides to follow them. He arrives in Belmont at the home of Professor Paul Emmett...
Answer:
Does Old Haven really exist?