Slumber (2017)

When Dr. Alice Arnolds was a child, she witnessed her sleepwalker brother falling off the window and dying during the night. Now she works in a clinic in sleep therapy with her colleague Malcolm. When the middle-class Morgan family has problem with the sleep of the son that sees a monster, Alice believes the boy has sleep paralysis but brings the whole family to the clinic to monitor their sleep. Sarah Morgan, her husband Charlie Morgan, her son Daniel Morgan and daughter Emily Morgan sleep in a room with surveillance cameras. Charlie attacks Alice during the night and she believes she resolved the case of an abusive father and Charlie is arrested. But soon Daniel is attacked again, and the janitor Cam and his uncle Amado tells Alice that the ancient demon nocnitsa is the responsible for drama of the Morgans.