Jay (Jason Segel) and Annie (Cameron Diaz) are a married couple still very much in love, but ten years and two kids have cooled the passion. To get it back, they decide - why not? - to make a video of themselves trying out every position in THE JOY OF SEX in one three-hour marathon session. It seems like a great idea until they discover that their most private video has gone public. In a panic, they begin a wild night of adventure - tracking down leads, roping in friends and duping Annie's boss - all to reclaim their video, their reputation, their sanity and, most importantly, their marriage.