What if your imaginary friend from childhood suddenly reappeared... except this time he's no figment of your imagination, but an actual living person. For thirteen-year-old Charlotte "Charlie" Dickson, the shocking arrival of her imaginary friend, Rudy, seems to be the answer to all her problems--until his presence starts unleashing a storm of mayhem. The problem with imaginary friends is that they know things about you. Rudy's familiarity with the Dickson family secrets causes a trail of chaos that not only jeopardizes Charlie's acrobatic dreams but threatens to tear her family apart.