Austin, Ally, Trish, and Dez experienced many things together as friends, they know everything there is to know about each other. Not! The one you least expect who loves honesty is keeping a big secret from all of them, ALLY. She says she's an only child but not only does she have a sibling, a TWIN. Her twin is also famous, the total opposite of Ally, and everything she wants to be. One more thing, AUSTIN'S DREAM GIRL! When Ally's twin comes home from tour, secrets, romance, jealousy, and hate will unravel.