In Brooklyn, a lapsed Orthodox Jew named Yakov is financially struggling and disconnected from his former community. Late one evening, he reluctantly accepts an opportunity for some quick cash: to serve as a "shomer," watching over the body of a recently deceased member of the community overnight. This practice, rooted in ancient Jewish lore, is believed to protect the dead from evil spirits until their burial. The deceased, Mr. Litvak, has passed away under mysterious circumstances, and his widow warns Yakov of a malevolent entity that haunted her husband. Despite his skepticism and desperate for money, Yakov agrees to the vigil, setting the stage for a night of unsettling experiences.

As the night unfolds, Yakov, equipped with only his faith and a dwindling supply of light, begins to encounter strange phenomena that challenge his beliefs and mental state. Alone in the dimly lit house, he is confronted with unexplained noises, flickering lights, and disturbing visions. These supernatural occurrences delve into Yakov's own traumas and guilt, blurring the lines between reality and nightmare. With the dawn far off, Yakov must confront both the malevolent force seeking to break through and his personal demons, testing the limits of his faith and courage in a battle against an unseen enemy that preys on vulnerability and fear.