Mara is a 2018 American supernatural horror film directed by Clive Tonge in his feature-length debut and written by Jonathan Frank. The film stars Olga Kurylenko as criminal psychologist Kate Fuller, who investigates the murder of a man and is haunted by the eponymous demon (Javier Botet) who kills people in their sleep. The film also stars Craig Conway and Rosie Fellner. Tonge and Frank based the film's story on conditions and mythology surrounding both sleep paralysis and Brugada syndrome. The film was released by Saban Films on September 7, 2018.


The film opens when Sophie Wynsfield is awakened by her mother, Helena (Rosie Fellner), screaming, supposedly after murdering her husband. Kate Fuller (Olga Kurylenko), a criminal psychologist, is called by Detective McCarthy to diagnose Helena and deduce whether to commit her to a mental institute. Upon interviewing both Helena and Sophie, both insist that Mr. Wynsfield was killed by the sleep demon, Mara. Kate signs to have Helena committed.