In 1970s Los Angeles, when social worker Anna Garcia (Linda Cardellini) ignores the eerie warning of a mother suspected of child endangerment, her children are drawn into a frightening supernatural realm.

The woman warns her about La Llorona, a horrifying apparition who through her own actions, has become trapped between Heaven and Hell. While alive, she drowned her own children, then killed herself by jumping into the churning river after them. Now her ghost creeps in the shadows and preys on children, in a futile attempt to replace her own.