Teenager Maddie Simon believes her mother was possessed by a demon, driving her to commit murder. Determined to prove her mother's innocence, Maddie decides to perform a ceremony copied from the "found footage" of the Kate Winters possession event in Proof of the Devil 1. Through her own possession, Maddie is determined to document her demonic transformation and broadcast it live over the Internet, for millions of viewers to see, to believe...and to copy.—Anonymous