After her release from prison, Asia Reaves (Zazie Beetz) finds it difficult to get a job. What luck that her sister can get her a position as a maid in an exclusive New York highrise. But it is not that much of a blessing as most of the previous maids disappeared mysteriously. As it turns out a satanic cult is loose in the building and they have chosen Asia as their next sacrifice. But she is not going to make it easy for them.