The Vow is a bittersweet amnesia story that begins with Paige (Rachel McAdams) unfastening her seat belt to have romantic sex with husband Leo (Channing Tatum) one snowy night in Chicago. Before foreplay can commence, they're hit from behind by a truck, she goes through the windscreen and comes out of a coma some weeks later with no memory of her husband or marriage. Instead of a reunion with Leo, Paige reverts to her former life with her stuffy, upper-middle-class parents (Sam Neill, Jessica Lange), whose big secret is long withheld from the audience, and who are bent on wooing her back from Leo and his mildly countercultural life. He has to fight to retain her, and one of his jobs is convincing her that her favourite novel isn't that Paige-turner, James Patterson's The Beach House, but something much more serious. Some task that. Said to be "Inspired by true events" (which film isn't nowadays?), The Vow is a painfully humourless affair that I expect to have forgotten by the time this review appears.