17 year old Cassidy Lark is best friends with Luke Hemmings, yes THE Luke Hemmings of 5sos. 2 years ago he said goodbye, but it wasn't forever. It was supposed to be 3 years, but when her boyfriend cheated on her, she needed him more than ever. Finally reuniting, the other boys start to fall for her. Will the drama get in the way of their friendship? Who will she pick?