Cassie Payne, who is nineteen years old, lives in New York and just finished college. She is moving back to London to live with her older brother and his friends, who is, as you might have guessed, the famous Liam Payne, Harry Styles, Louis Tomlinson, Niall Horan and Zayn Malik of One Direction. Liam is Cassie's older brother. She also misses her four best friends, Harry, Louis, Niall and Zayn. But she mostly misses Harry.
Before Cassie moved to New York, Harry and her had an inseparable bond that nothing could have ruined it, until Cassie had to move. Harry had promised her that they would keep in touch, but he rarely did.
With only a few calls and messages, Cassie got confused and hurt.
Before Cassie could blink, she is already in London and in the middle of a group death hug by One Direction.
Harry is acting like nothing happened before his promise, which Cassie doesn't understand.
They have a great time together and had some goofy moments, which may have involved them being kicked out of a shopping mall (blame Louis and Niall).
But all the fun had to end sometime because one night, when they were having Christmas dinner, Cassie had an accident and had to be rushed to the hospital. The last thing she remembers before passing out was what Harry said,
"I love you."
After that day, things were never the same.