Paul (Jason Lee) is about to tie the knot with Karen (Selma Blair), the perfect fiancee. But after a completely unexpected encounter with Karen's cousin Becky (Julia Stiles), Paul tells Karen a teensy lie to keep her from finding out what may or may not be the truth. That teensy lie turns into a bigger one and soon his life is a series of comical misunderstandings. It's amazing how much can change because of one little thing.