Ava is welcomed home from the hospital by a doting mother, lively friends, and a crush finally beginning to show interest. There's only one problem: Ava can't remember any of them--and can't shake the eerie feeling that she's not who they say she is. Ava struggles to break through her amnesiac haze as she goes through the motions of high-school life, but the memories that surface take place in a very different world, where Ava and familiar-faced friends...