Karen, an American living in Japan, desperately wants to fit in and plays the Japanese Ouija with her peers, unwittingly disrespecting a local deity who sets her up to fight her newfound friends in a deadly game of battle royal.
A graduate student, who is trying to finish the last of her research on a book project that she hopes will help her down-on-her-luck mother, brings friends to a house with a dark past, where they soon unwittingly summon an evil entity who makes the house part of its game…
When Claire Spencer starts hearing ghostly voices and seeing spooky images, she wonders if an otherworldly spirit is trying to contact her. All the while, her husband tries to reassure her by telling her it's all in her head. But as Claire investigates, she discovers that the man she loves might know more than he's letting on.