- Marta, Rebecca and Simone, three college mates, decide to spend a night at Marta’s house, in the country, away from the city.
A streak of jealousy and attraction for Simone is noticeable in the two girls.
After dinner the guys take their seats in the living room and Marta starts telling a story related to this house.
The ex-tenant, an old woman who lived together with about ten cats, died of mysterious causes, rumours said she made people the evil eye. Her corpse was found tortured and scarified by her own pets.
At this point Marta suggests a game to get in touch with the old woman and to find the causes of her death, a dangerous game named Musicomancy; it soon becomes clear it was Marta who had arranged it on purpose to kill the two friends.
This is not the first murder Marta commits with the help of this game.