Cassidy Taylor had a fresh new start when she moved back to Los Angeles from Mullingar, at sixteen. She left everything behind, especially her embarrassing and painful past. Believe it or not, she used to best friends with Niall Horan, one-fifth of international boy band, One Direction. Inseparable since childhood, the two of them had the closest bond until she moved 4,000 miles away. Three years later, she's back and things have changed- quite a lot. While Niall's finished a tour, released a new album, and got the fans following his every move, is he still the same? Is Cassidy still the same? When they accidentally run into each other, their lives are destined to change forever. Will they both still remember the past? Or will they just throw it all away, forgetting everything they've been through?