Fletcher Reede is a fast-talking attorney and habitual liar. When his son Max blows out the candles on his fifth birthday he has just one wish - that his dad will stop lying for 24 hours. When Max's wish comes true, Fletcher discovers that his mouth has suddenly become his biggest liability.
In honor of his birthday, San Francisco banker Nicholas Van Orton, a financial genius and a cold-hearted loner, receives an unusual present from his younger brother, Conrad: a gift certificate to play a unique kind of game. In nary a nanosecond, Nicholas finds himself consumed by a dangerous set of ever-changing rules, unable to distinguish where the charade ends and reality begins.
William Thacker is a London bookstore owner whose humdrum existence is thrown into romantic turmoil when famous American actress Anna Scott appears in his shop. A chance encounter over spilled orange juice leads to a kiss that blossoms into a full-blown affair. As the average bloke and glamorous movie star draw closer and closer together, they struggle to reconcile their radically different lifestyles in the name of love.