This poster promotes the horror film "The Last Exorcism" about a little girl who is possessed by an evil spirit. The poster image shows the girl bent backwards in an unnatural position, covered in blood with her hair tangled and limbs contorted to appear lifeless. Religious symbols like a crucifix placed over the girl and the tagline "Believe in Him" imply either God or the devil could help or harm her. The poster effectively uses frightening imagery and religious themes to intrigue audiences and promote the horror film's narrative of possession and exorcism.