The Mannequin follows Liana Rojas (Gomez), a creatively stifled stylist assistant whose life spirals into a nightmare when she uncovers that the historic downtown Los Angeles building where her sister met a mysterious end is haunted by the vengeful spirit of a serial killer. Fifty years prior, the site was a slaughterhouse of unspeakable brutality—victims lured, murdered, and dismembered in ritualistic fashion. Now, the spectral presence stirs once more, its macabre energy reawakening as Liana and her friends become trapped within its cursed walls. As reality fractures and limbs vanish in the darkness, they must unravel the building’s grim legacy and confront the entity’s twisted logic before they too become permanent fixtures in its grotesque tableau.