After the psychologically scarring death of her father, wild child Rosie Dwyer is introduced to journal keeping. She initially considers this writing form to be cliché. Before the death, Rosie valued chaos and rebellion- from "protest-peeing" in class to shoving a Twinkie in a classmate's eye. However, once Rosie gives into this mode of writing, a cathartic obsession begins.Her entries often focus on her childhood enemy, Logan Fields, after he becomes Rosie's permanent peer editor in creative writing class. While Rosie loses touch with both loved ones and reality, an unlikely friendship builds between her and Logan. Together, they must try to find the meaning behind insanity—in the school theatre, in the public library, and in the middle of a false Apocalypse.