"Paul Morse (Jason Lee) wakes up the morning after his bachelor party in bed with a beautiful girl (Julia Stiles) and presumes he must have cheated on his fiancée, Karen (Selma Blair). Desperate to keep Karen from finding out what may or may not be the truth, he tells her a teensy lie … which turns into a bigger lie, and so on. Soon, his lies are spiraling out of control, and his entire life is a series of comical misunderstandings."