Tessa Young is an 18 year old college student with a simple life, excellent grades, and a sweet boyfriend. She always has things planned out ahead of time, until she meets a rude boy named Hardin, with too many tattoos and piercings who shatters her plans.

Sadie Lockwood is a newly turned seventeen year old who loves getting in trouble. Kate Wellington - Sadie's best friend - opens a door to a whole lot of trouble when she steals Harry Style's cell phone during a CD signing in London one spring afternoon. With Harry's phone in Sadie and Kate's possession, tensions rise when Harry's bandmates start sending text messages revealing secrets no one knows about the band One Direction. When Harry realizes his phone has gone missing it's a chase to get his phone back from these two troublesome girls. Will he ever get it back? Or will their secrets be spread worldwide?