Claudia, a 25-year-old with serious insecurities, rents the upper floor of an isolated house. She meets the owner Letizia, a charming woman with a dark past who introduces her to electronic voice phenomena, a technique that allows to communicate with the dead. That innocent game soon turns into a nightmare: after discovering the terrible secrets contained in that house, Claudia will have to survive the madness of Letizia, determined to sacrifice it to supernatural entities.