Two sisters went missing—Grace, the outgoing athlete who is friends with just about everyone and Maddy, the wallflower who would rather absorb herself in her journal than talk to other classmates...even if she secretly wished her sister would acknowledge her more at school.  But when Grace is found with no memory of what happened because of a traumatic head wound, everybody thinks she’s lying. It is hard to look innocent when Maddy’s blood is on her clothes.  Desperate to save her sister—and her own reputation—Grace must piece together what happened on that school trip with her sister’s notebook and the secrets she and other students may be keeping that they are too afraid to tell the police. Both of their lives depend on it.