Young American dancer Susie Bannion arrives in 1970s Berlin to audition for the world-renowned Helena Markos Dance Company. When she vaults to the role of lead dancer, the woman she replaces breaks down and accuses the company's female directors of witchcraft. Meanwhile, an inquisitive psychotherapist and a member of the troupe uncover dark and sinister secrets as they probe the depths of the studio's hidden underground chambers.

Washington, D.C. psychologist Carol Bennell and her colleague Dr. Ben Driscoll are the only two people on Earth who are aware of an epidemic running rampant through the city. They discover an alien virus aboard a crashed space shuttle that transforms anyone who comes into contact with it into unfeeling drones while they sleep. Carol realizes her son holds the key to stopping the spread of the plague and she races to find him before it is too late.