When Katherine Walters awakes from a coma, she learns several things: she has parents, friends, a best friend, and a boyfriend. And she remembers nothing about any of them. As she's left to answer questions no one will answer for her, she comes across several more mysteries she has to unravel: who her friends really are, the information in an old diary with a name that's definitely not Katherine scrawled across the cover, and, most frustratingly,...