Simbiosis

Year 2000. The ilin alien race arrives on earth and makes an agreement with humanity for a symbiotic relationship: they offer their knowledge and technology in exchange for sharing their bodies and terrestrial resources. Despite some detractors, the new life between humans and ilin brings great benefits, including a drastic drop in crime. This is why, decades later, the entire world is shocked by a terrible series of murders of non-symbiont humans. The body of the alleged last victim has not been found, so an investigation is opened in the hope of saving her in time.