One of them is lying. So is the other.
An advice columnist, Andie Anderson (Kate Hudson), tries pushing the boundaries of what she can write about in her new piece about how to get a man to leave you in 10 days. Her editor, Lana (Bebe Neuwirth), loves it, and Andie goes off to find a man she can use for the experiment. Enter executive Ben Berry (Matthew McConaughey), who is so confident in his romantic prowess that he thinks he can make any woman fall in love with him in 10 days. When Andie and Ben meet, their plans backfire.