The Mannequin follows Liana Rojas (Gomez), a creatively starved stylist assistant who discovers the historical downtown Los Angeles building where her sister mysteriously died is haunted by a serial killer who brutally murdered and dismembered his victims
Based on actual events of American serial killer Edmund Kemper, who murdered his grandparents at age 15 and, after being paroled for that crime, killed eight women in 1972 and 1973 including his own mother.