Three years after the incident of the dance academy in "Suspiria", a new group of people is being watched in a New York City apartment building by a mysterious evil force hell-bent on revenge. When young poetess Rose Elliot finds out too much about the place via an ancient book called "The Three Mothers", she gets beheaded. The only person to stop the killings and uncover the secrets is her brother Mark, a music student in Rome. As he solves the puzzle, the murders get intense, and the demonic evil reveals itself. As the unstoppable horror spreads from Rome to New York City, this unholy trinity must be stopped before the world is submerged in the blood of the innocent.—