Don't Look Down... (A One Direction Fan Fiction)

When Cassie and Her best friend, Niall Horan both try out for the X- Factor, they both make it. Everything finally begins to go great for Cassie, her world instantly crumbles round her. She gets a brain toumor. Thankfully, she survives. When she moves back to London ll by her self, she meets her current best friend, Brooke. She moves in with Brooke, and along the way, she reunites with someone she thought she'd never see again.