In Zed and Addison's final year at school, Seabrook has become a haven for monsters and humans, but when intergalactic outsiders show up to compete in the Cheer-Off, Seabrook suspects that they may want more than a friendly competition.
Two young sisters find that all the mirrors in their estranged aunt's house are covered or hidden. When one of them happens upon a mirror in the basement, she unknowingly releases a malicious demon.