Barbara Novak (Renee Zellweger) has just come down from Maine to New York after writing a book called Down With Love. The book instructs women to have sex the way a man does, and to detach oneself from love completely. Catcher Block (Ewan McGregor) is a successful journalist tapped to write a cover story on Novak. He blows her off at every opportunity to cuddle with flight attendants.

However, when Novak’s book is a complete success, Catcher finds himself being blown off by her! So he starts to write an expose and disguises himself as a naive astronaut named Zip Martin. But he can’t imagine what happens next!