One day in his hotel room, Niall gets a package of twenty one letters. Twenty one letters about a girl who poured her heart out to Niall, a girl who is dying inside and is trying to fix herself again. As Niall begins to read, and the letters begin to run out, he finds himself knowing and loving this girl, all the while knowing that one day, he's going to have to stop reading. Because she stopped writing.

Alexandria and Hailee are two twin sisters, Alexandria {Alexa} Hailee is best friends with Madison Pettis and Kylie Jenner,Anstasia Karanikolaou, and Maddie Johnson, Alexa is best friends with Kendall Jenner, and Spencer Johnson.