What if you know your girlfriend's secrets?

Tommaso, under the pseudonym of Marquez, writes the answers of the “Agony Aunt” column of a bad magazine. He has never revealed it to his busy partner Zoe. One day, among the several broken hearts mails, he got one from a girl asking for advice on how to break up with her boyfriend as she is not sure to be any longer in love with him. And this girl is Zoe, his girlfriend for ten years.
What’s next step then? Answer her through the column? Go home and ask her for explanation?
Tommaso decides to answer her privately under Marquez’ pseudonym asking for more details about her couple issues. He discovers problems he did not even suspect and every attempt to save the relationship seems to be very hard, especially as Zoe is slowly falling in love with Marquez…