Niall Horan. 1/5 of One Direction. And hes just found out he has a depressed - among other things - twin sister. Harry Styles. Also 1/5 of One Direction, and still suffering from leaving the girl he loved to go to X Factor, and din't leave on the best terms. So when Niall's sister turns out to be the girl from Harry's past, what will happen? Gabriella Horan has serious depression, mental issues, lung cancer - the list goes on for quite a while. 2 Years before she was about to commit suicide, but a certain curly haired green eyed boy stopped her. Will Harry be able to help her once more? Or will she be forever lost to the blackness she has been consumed in for 2 years?