Andie Anderson (Hudson) agrees to write a first-hand account about what it takes to drive a man out of your life...in exactly 10 days. At the same time, eligible ad agency bachelor Benjamin Barry (McConaughey) accepts a high-stakes bet that he can lure any woman into falling head-over-heels in love with him...also in 10 days. The resulting romantic head-on collision ignites a series of deliriously comic deceptions that prove when it comes to true love...your heart cannot tell a lie.