If you're a fan of atmospheric horror like The Vigil or Annabelle , Lullaby offers a chilling ride. It isn't just about the demon; it’s about the . It serves as a reminder that sometimes, the things we do to protect our children are exactly what puts them in danger.

Unlike many horror films that lean on Christian iconography, Lullaby integrates Jewish folklore and the legend of the Kabbalah . This gives the supernatural elements a distinct cultural flavor, even if critics felt the execution occasionally leaned into "conventional boogeyman" territory.

The story follows Rachel () and John, a pair of new parents struggling with a baby that simply won't stop crying. Desperate for rest, Rachel discovers an ancient book containing what appears to be a soothing lullaby.