I wish I had known how good this movie was going to be; I would have recorded it. The previous poster already explained the plot. I want to add that the characters are well written and you will end up caring about what happens to them. The two leads have fantastic chemistry - he is HOT! I loved that the movie made me laugh. Many scenes did not feel contrived. It's not the usual "girl is in mortal danger and an idiot" plot or the "my love is going to change the man I love" crap.
Anyway, just go ahead and watch it. If you like romantic comedies, you should tape it. I am in my forties and this movie felt like the writers were not talking down to me or like I was wasting my time. I wish Lifetime would develop more believable stories like this one.